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4. For prices of cem, sand, etc, see " Price List," under 1, and its subdivi-
sions, pp 984, etc.

5. The cost of any one material, per cu yd of cunc, varies greatly in diff
cases, due to wide variations in the percentages employed for diff grades of
cone, and can therefore be approximated only betw wide limits.

6. Roughly stated, the total cost, for materials alone, may be ex-
pected to fall somewhere between $2.50 and $7.50/cu yd of cone. The av
would probably be $4 or a little more, exclusive of reinfmt.

7. Cement. For prices, see "Price List," 1.34, p 985. Per cu yd of
cone, betw $1.50 and $4, $2 and $3 being the more usual limits; affected
chiefly by grade of cem and richness of mixture.

8. Sand. For prices, see "Price List," under 1.32, p 985. Per cu yd
of cone, betw 15 cts and $1, usually below 25; affected chiefly by grade,
dist from bank, natural monopoly, and proportion used in mixture.

9. Gravel. In the pit, exclusive of screening, loading and hauling, from
20 cts to 75 cts per team load; affected chiefly by quality, and natural
monopoly.

10. Stone. For prices, see "Price List," under 1.32, p 985. Av price
for stone, broken to reqd size, at quarry, exclusive of cartage, about $1 or
$1.50 / cu yd stone. Per cu yd cone, betw 50 cts and $1. Affected chiefly
by quality, dist from quarry, natural monopoly, and proportion of mixture.

11. Reinforcement. Cost will vary with the design and type em-
ployed. For iron and steel bars, see "Price List," 1.43, p 986.

Plain rods, 50 ton lots, at mill, cts per Ib, approx:

< H", 1 1 A; < Y*", i %; < %", 2; < H", 2 y.

Ransome twisted rods, about % ct per Ib more.
Other deformed bars, % to Yi ct per Ib more.

12. The percentage of reinfmt usually varies from about ^ % to
of the cross-sec of a beam or slab.



1208 CONCRETE.

Cost of Transportation to Storage.

13. Freight. Cem, by rail. Freight rates vary greatly in diff locali-
ties, often due to no other apparent reason than arbitrary discrimination,
running as low as ^ ct / ton-mile, and above 2 cts; in general, 1 to 2 cts]

14. By Canal. Boat loads of 100 tons of 2000 Ibs each, cem, 1 to 2 cts/
ton-mile, according to dist; stone and sand, M to 1J^.

15. Coastwise freight. In carload lots, 0.4 to 0.6 ct / ton-mile, approx.

Cost of Storage, etc.

16. Storage. Ordinary cem barrels may be stored about 5 layers high,
which requires about 1 % Q f t floor space per bbl.

17. Screening. Cost, by hand, betw 10 and 25 cts or more / cu
yd of material handled. Machine screening, betw 4 and 8 cts / cu yd. To
obtain the cost per cu yd of the screened material, multiply cost per cu
yd by the ratio of total quantity handled to quantity accepted.

18. Washing. Cost of washing sand, gravel and crusht stone may be
5 cts or more / cu yd of material handled, for mechanical washers, handling
large quantities. For small quantities, washt under unfavorable condi-
tions, as high as 40 cts.

Cost of Mixing and Placing.

19. Mixing and placing. Total cost, exclusive of forms, from
$1 to $2.50 / cu yd of cone.

20. Labor required, for fairly large quantities, on an av, one man for
each 2 or 3 cu yds mixt and placed per day. On small jobs, each man will
turn out much less.

21. Dry cone costs about $1 more per cu yd to mix and place than wet
cone. Herman Conrow, Jr, A S C E, Trans, Vol 42, 1899, p 124.

22. Loading. From 12 to 24 cu yds of sand loaded into carts per man
per day. 12 appears to be usual, but 24 not unreasonable.

23. Transportation. Av load broken stone, gravel or sand.

Wooden wheelbarrows 2M to 2> cu ft = 0.09 cu yd.

Iron wheelbarrows 1.9 cu ft = 0.07 cu yd.

Cost of transportation per cu yd cone ordinarily betw 11 and 25 cts, de-
pending largely upon the length of haul and the industry of the laborers.

Cost of Mixing.

24. Mixing (only). Much depends upon the diligence of the laborers,
and the size of the mixer. Several examples indicate costs less than 10 cts
/ cu yd, counting labor only, while others indicate, quite regularly, about
25 cts. Sabin says "The cost of mixing cone in large quantities is seldom
less than 30 cts / cu yd if allowance is made for plant."

25. As far as practicable, the course of the material should be downward;
the mixer being kept above the work if possible. If an elevator is used
for the cone, its entrance should be below the mixer. In subway or sewer
work, the mixer can sometimes be placed below the street level and yet
above the level of the work, so that it becomes unnecessary to raise the
materials, again after dumping them onto the street from the wagons.
Much may be lost if the supply of materials and the demand for cone are
not kept nearly equal, or if the conditions are such that the men cannot
keep out of each other's way.

26. Ordinarily, more than half a dozen men cannot be disposed about a
mixer to operate it to advantage, measuring materials, cleaning up plat-
forms, etc (besides those actually engaged in getting the materials to and
from the mixer). Cost, for labor only, should not be much over 15 cts per
cu yd of cone, even with small machines.

27. Mixers, turning out from 10 to 40 cu ft of concrete per batch (or,
assuming one batch every 2 mins, 10 to 40 cu yds per hour) will cost from
$500 to $1000, and will require from 5 to 10 HP. to operate. Hand power
machines, with a capacity of 5 cu ft per batch, about $250.

28. Cost of setting up a mixer, and taking it down, including carting a
few miles, and depreciation, betw $50 and $100.

Up to 100 or 200 cu yds of cone, hand mixing is usually more economical
than machine mixing.



COST. 1209

29. The first cost of a hand mixing plant, to be operated by 8
or 10 men, estimated as follows:

8 square-pointed shovels, size No. 3 $10

3 iron wheelbarrows 35

2 rammers 5

1 mixing platform, 15 X 15 ft 10

Total $60

30. Performance. When material is promptly delivered, batch
mixers turn out, on an av, one batch in from 2 to 3 mins. A batch in one
min is extremely fast working. Sometimes 4 or 5 mins are reqd. For
capacities and power reqd, see under "Mixers," H 27.

31. The cost of a mixing plant for cone work is variously estimated at
from 3 to 5 % or more of the cost of the work.

32. The life of a mixer, under av conditions, is from 30,000 to
40,000 batches. Thus, a mixer, turning out 120 batches per day, will
require renewal in about a year. A new drum will generally be needed
after turning out two-thirds the total quantity.

33. Mixer to forms. Time to fill a barrow from a mixer, about 10
sees; to discharge the entire mixer at one operation, 15 to 20 sees.

34. Av barrow load of mixt cone, 1 J^ to 1 % cu ft = 0.06 cu yd. One-
horse carts hold about J^ cu yd; two-horse, 1 to 2 cu yds. To compute
costs of hauling, etc., see Art 4 under "Cost of Earthwork," p 801.

35. About 10 or 15 cu yds of cone per man per 10 hour day can be loaded
by shoveling.

Cost of Forms.

36. Cost, including material and labor, varies chiefly with the character
of the structure; simple forms for mass work being relatively cheap, while
those for detailing walls and floors of bldgs, especially in reinfd cone, are
about the most expensive.

37. Material for forms, betw 10 and 80 cts / cu yd of cone in place.

38. Fabrication and erection will cost from $4 to $10 per 1OOO ft B.M.
for the simpler forms of construction; in buildings, from $10 to $20.

39. The cost of forms may be as low as 10 and as high as 50 per cent of
the total cost of the cone in place; 25 to 35 % for forms for ordinary reinfd
work, 50 % or over for detailed building work.

40. The cost, per sq ft of surface (as one side of a wall) can be
best computed for the work in hand, given the cost of the lumber and labor
available; but will usually be betw 4 cts and 20 cts. One carpenter can
build and remove abt 25 sq ft of rough braced plank forms in 10 hours.

41. The cost of forms, per cu yd of concrete, in building constr,
is stated betw $3 and $10, from $4 to $6 being sufficient for floor construc-
tion, and $5 to $7 being more usual limits for forms for reinfd work. %

42. Shifting and depreciation. The figures given for cost of
forms assume that the material is not used again. For special work, in-
volving difficult and unusual details, the forms are practically worthless
after they have been used. Ordinarily the lumber can be used 2 or 3 times
before it is discarded. On large buildings, the forms for which are carefully
designed, and where the detailing is similar thruout, forms may be used a
half dozen times.

43. The labor of shifting forms will be not much less than the labor of
first erecting them.

44. Cost of labor, for placing forms, betw 3 or 4 % and 20 % of the
cost of cone in place.

Cost of Placing.

45. Cost of fabricating (bending, framing, &c) and placing

reinfmt, from about Y^ to 1 K cts / Ib of reinfmt. Unit systems, 33 to
50 % more.

46. Depositing. The actual labor required, for depositing only, seldom
amounts to more than an extra man to help dump carts, move shutes, etc;
not more than a few cts per cu yd of cone placed. Records indicate from
7 cts up, but these probably include transportation from mixer to forms.



1210 CONCRETE.

47. Spreading and ramming. Cost varies greatly with the
character of the work; being as low as 15 cts / cu yd in fairly rough mass
work (5 cts if the mixture is very wet); and as high as $1 or more
where much care is taken in placing, tamping, ramming and spading. Less
if cone is dumpt from carts or buckets in large quantities.

48. For ramming alone, from 5 to 15 or 20 cts / cu yd; seldom over 40 cts.

Miscellaneous Costs.

49. Inspection and superintendence, as usually done, about 1
to 3 % of the cost of the work. In view of the gross inefficiencies that are
likely to result if the work is not well arranged or the men not kept up to
standard, it may pay to expend as much as 5 or 10 % or more.

50. Finishing. Data very variable, due probably to diff in method.

51. Washing with brush, % ct to 7 cts / sq ft of surf; with dilute hy-
drochloric acid, to remove efflorescence, about 20 cts / sq ft.

52. Bush hammering; 3 to 26 cts / sq ft. Pneumatic, less than 1 ct.
Pointing up and brush coating, 25 cts / sq ft or more.

Total Costs.

53. Plain. For total costs, see "Mass," etc, 1 56.

54. Dry cone, about $1 more per cu yd than wet, due to additional
labor of ramming.

55. Gravel cone $1 to $2 / cu yd cheaper than stone cone, given the
same ratio of (sand + stone) to cem, the greater diff obtaining in mixtures
low in cem.

56. Mass. Breakwaters, fortifications, etc, cost betw $5 and $7 / cu
yd of cone in place, the av being very close to $6. Extremes as low as $4
arid as high as $8.

57. Reinforced. Where work is well organized, reinfd buildings may
be built for as low as $10 / cu yd of cone in place; but the general av is
nearer $18, while some builders estimate roughly on $1 / cu foot ($27 / cu
yd) altho few records run so high.

58. The cost depends chiefly upon the forms (see "Forms," U 36). If
these are well designed, so that they are easily shifted and can be used re-
peatedly, the cost is low; as compared with special jobs, where refinements
in designing would not pay.

59. Retaining walls, foundation walls, abutments, locks, piers, etc,
vary greatly, apparently owing to the widely varying difficulties of construc-
tion likely to be encountered. The extremes run from $4 to $16 / cu yd
of cone in place. Quite often, however, the price will be betw $6 and $9.
Reinfd walls from $3 to $10 more.

60. Arches of moderate span, say up to 30 ft, for culvert work, etc,
from $5 to $10 / cu yd.

61. Buildings. Cost may be expected t9 fall betw $6 and $12 / cu yd
of cone in place, with the av about $8 for plain, and $10 to $15 or $20 for
reinfd construction.

62. For any given type of constr, all portions of a building (except
foundations), such as the floors, walls, and columns, cost practically the
same per cu yd.

63. Mr. L. C. Wason (E R, '09, Feb 27, p 233) gives, as cost of
buildings :

$ per cu ft of space enclosed $ per sq ft of floor



max av min max av min

Offices and stores.. ..0.197 0.131 0.084 2.42 1.77 1.12

Factories 0.129 0.102 0.060 1.70 1.34 0.90

Garages 0.118 0.102 0.085 1.23

Filters 0.333 0.233 0.134 3.82 2.43 1.04

Storehouses 0.083 0.076 0.069 0.84 0.71 0.58

Mills, etc, 2d class. ..0.122 0.069 0.045 1.51 0.90 0.54



PRICE LIST.

PRIC LIST.

Numbers following titles refer to Business Directory, next page.
Wood, Lumber, Timber.

Lumber, in dollars per 1000 ft board measure (B M):

Yellow pine, boards, 17.50 to 21.50; timbers, 25; A Edge grain floor-
ing, 36.75.

Black Walnut, 115. Yellow Poplar, 62. White Ash, 60.

White Oak, 82. Hemlock, boards, 22.

Spruce, 38 to 41. Chestnut, 52. White Cedar (tank plank), 37.50
Shingles, cypress, per 1000, 8 to 11.
Studding, joists, rafters, etc., hemlock, 15 to 18.

Stone.

92, 231.7, 620.

Sand and gravel, 20 to 50 cts per cu yd on cars or carts at bank, sub-
ject to wide variation in special cases.
Broken stone, 75 cts to $2 per cu yd.
Trap rock, 70 cts per ton of 2000 Ibs.

Asphalt.

61, 267, 437, 559, 583, 642, 644.
$25 to $35 per ton.

Cement.

20.5, 22, 23, 30, 54, 149, 170.55, 171.8, 177, 220.5, 257.5, 258, 273.2,
290.5, 352, 358, 366, 389.3, 404.5, 470.5, 472, 538.3, 538.7, 569, 616,
634.5, 643, 657.

Portland (artificial) cements, per bbl of about 400 Ibs gross: German,
$2.25 to $3.00; American, $1.10 to $1.60.

Rosendale (natural) cements, per bbl of about 300 Ibs net: From Rosen-
dale Township and vicinity, Ulster Co., N. Y., 85 cts to $1.00; other
Rosendales, 70 to 85 cts.

About $1 to $2 worth of cement mortar required per cu yd of masonry in
buildings, $1.50 to $3 per 1000 bricks.

Lime, 60 to 90 cts per bbl of about 250 Ibs.

About 60 cts worth required per cu yd of masonry in buildings. $1 to
$1.50 per 1000 bricks.

Plaster, $1.50 to $2 per bbl of varying weight.

Reinforcement.

44, 104, 121.5, 127.5, 161.5, 170.3, 170.5, 172.6, 223.5, 256.5, 268.5,
305.5, 307.5, 315.5, 410, 420.5, 434.5, 454.5, 530, 548, 624.5, 664.8.

Fire-proofing:, Concrete-metal Construction.

Concrete-metal construction: Concrete and wire, flooring, 15 to 25 cts per
sq ft, exclusive of floor beams. For covering columns and girders, 15
cts per sq ft; if concreted, 20 cts. Walls, 70 cts to $1.40 per sq yd.
Wall furring, 40 to 80 cts per sq yd. Lathing, plain, 12 to 22 cts per sq yd.

Metal, galvanized, 5 to 7 cts extra. To apply metal lath, 7 to 9 cts per
sq yol.

Concrete Mixers.

142.5, 146.5, 164, 209, 211.5, 231.3, 250.1, 319.5, 346, 348.5, 389.7, 427.5,
459.3, 511.5, 565.5, 566.7, 606.5.

Each, $225, $500 and upward to about $1500.

Concrete Block Machines.

33.5, 142.2, 311, 319.5, 418.5.

Rock and Ore Crushers.

55, 97, 160, 173, 238, 275, 319.5, 338.7, 513, 604.5, 622.5, 631.5, 634.7,

668.5.
REC'V'G CAP., CAPACITY, H. P.

INCHES TONS PER HOUR REQUIRED. PRICE.

8 X 14 10 to 15 10 to 12 $600

9X16 12 to 18 12 to 15 800

10X18 16 to 24 15 to 20 1000

12 X 24 24 to 40 30 to 35 1600

14 X 36 45 to 60 60 to 75 4000



BUSINESS DIRECTORY.
BUSINESS DIRECTORY.



See Price-List.



20.5 Alma Cement Co.; Portland Cement; Wellston, Ohio.

22 Alpha Portland Cement Co.; Easton, Pa.

23 Alsen's American Portland Cement Works; 45 Broadway, New York.
30 American Cement Co.; Pennsylvania Bldg., Philadelphia."

33.5 American Hydraulic Stone Co.; Concrete Blocks, etc.; Railway

Exchange Bldg., Denver, Col.
44 American Steel & Wire Co.; Triangle Mesh Reinforcement; Chicago^

New York, Denver, San Francisco.

54 Atlas Portland Cement Co.; 30 Broad St., New York.

55 Austin Manufacturing Co.; Gyratory Crushers; Chicago, New York.
61 Barber Asphalt Paving Co.; Maurer, N. J., Land Title Bldg., Phila-
delphia.

92 Bound Brook Crushed Stone Co.; Crushed Trap Rock; Bound Brook,

N. J.

97 Bradley Pulverizer Co.; 92 State St., Boston.

104 Brown Hoisting Machinery Co.; Ferro-inclave Construction; Cleve-
land, New York, Pittsburgh.

121.5 Buffalo Steel Co.; Reinforcing Bars; Tonawanda, N. Y.
127.5 Calumet Steel Co.; Reinforcing Bars; Chicago.

142.2 Century Cement Machine Co.; Rochester, N. Y.
142.5 Chain Belt Co.; Concrete Mixers; Milwaukee, Wis.
146.5 Chicago Concrete Machinery Co.; Mixers; Chicago.
149 Chicago Portland Cement Co.; 108 LaSalle St., Chicago.
160 Climax Road Machine Co.; Crushers; Marathon, N. Y.
161.5 Clinton Wire Cloth Co.; Welded Wire; Clinton, Mass.

164 Cockburn Barrow & Machine Co.; Mixers; 30 Church St , New York.

170.3 Concrete-Steel Co.; Havemeyer Bars; 29 Broadway, New York.

170.5 Consolidated Expanded Metal Companies; " Steelcrete " ; Pittsburgh

and New York.

170.55 Consolidated Rosendale Cement Co.; 50 Church St., New York.
171.8 Coplay Cement Mfg. Co.; Portland Cement; Pennsylvania Bldg.,

Philadelphia.

172.6 Corrugated Bar Co.; National Bank of Commerce Bldg., St. Louis,

Mo

173 Cresson, Geo. V. Co.; Rock Crushers; Philadelphia and New York.

177 Cumberland Hydraulic Cement & Mfg. Co.; Cumberland, Md.

209 Drake Standard Machine Works; Mixers; 298 W. Jackson Blvd.
Chicago.

211.5 Dunning, W. D. ; Mixers; Water St., Syracuse, N. Y.

220.5 Edison Portland Cement Co.; New York; Philadelphia, Pittsburgh,
Boston, Newark, N. J., Savannah.

223.5 Electric Welding Co.; Reinforcing System; 316 Fourth Ave., Pitts-
burgh, Pa.

231.3 Eureka Machine Company; Mixers; 45 May St., Lansing, Mich.

231.7 Eureka Trap Rock Quarry Co.; Crushed Trap Rock; Hillside Ave.

and Sherman St., Richmond Hill, Boro of Queens, New York.
238 Farrel Foundry & Machine Co.; Crushers; Havemeyer Bldg., New
York.

250.1 Foote Concrete Machinery Co.; Batch Mixers; 184 LaSalle St.,

Chicago.

256.5 Franklin Steel Co.; Reinforcing Bars; Franklin, Pa.

257.5 Fredenburg & Lounsbury; Portland Cement; New York.

258 French, Sam'l H. & Co.; Cements, etc.; York Ave., 4th and Callow-
hill Sts., Philadelphia.

267 General Asphalt Co.; Land Title Bldg., Philadelphia.

268.5 General Fireproofing Co.; Reinforcing Specialties; Youngstown,
Ohio.

273.2 Glens Falls Portland Cement Co.; Glens Falls, N. Y.

275 Good Roads Machinery Co.; Crushers; Kennett Square, Pa., and

New York.
290.5 Hartranft, Wm. G Cement Co.; Portland Cements; Real Estate

Trust Bldg., Philadelphia.



BUSINESS DIRECTORY.

305.5 Hough, William B. Co.; Reinforcing Bars; Chicago.
307.5 Hudson Structural Steel Co.; Reinforcing Bars; 136th St. and South-
ern Blvd, New York.
311 Hydraulic Press Mfg. Co.; Presses for Building Blocks; Mt. Gilead,

Ohio.
315.5 Inland Steel Co.; Reinforcing Bars; Chicago.

319.5 Iowa Concrete Machinery Co.; Concrete Block Machines, Mixers and
Crushers; Waterloo, Iowa.

338.7 Kent Mill Co.; Pulverizers; 170 Broadway, New York.

346 Kingston Mfg. Co.; Mixers; Wilkes-Barre, Pa.

348.5 Koe^iring Machine Co.; Concrete Machinery; Milwaukee, Wis.

352 Kosmos Portland Cement Co.; Louisville, Ky.

358 Lawrence Cement Co.; Portland Cement; New York and Phila-
delphia.

366 Lehigh Portland Cement Co.; Allentown, Pa.

389.3 Marquette Cement Mfg. Co.; Portland Cement; Marquette Bldg.,
Chicago.

389.7 Marsh Company; Mixers; 969 Old Colony Bldg., Chicago, 50 Church
St., New York.

404.5 Meacham & Wright Co.; Cement; Chicago.

410 Merritt & Co.; Expanded Metal; Philadelphia.

418.5 Miracle Pressed Stone Co.; Minneapolis, Minn.

420.5 Monplith Steel Co., Inc.; Reinforcement; Washington, D. C.

427.5 Municipal Engineering & Contracting Co.; Cube Mixers; Railway
Exchange, Chicago.

434.5 National Wire Cloth Co.; Reinforcement; Monroe St., Sandusky,
Ohio.

437 Neuchatel Asphalt Co., Limited; Val de Travers Rock Asphalt;
265 Broadway, New York.

454.5 Northwestern Expanded Metal Co.; Reinforcement; Chicago.

459.3 Ohio Ceramic Engineering Co.; Mixers; Cleveland, Ohio.

470.5 Penn- Allen Portland Cement Co.; Allentown, Pa.

472 Pennsylvania Cement Co.; 26 Cortlandt St., New York.

511.5 Ransome Concrete Machinery Co.; Mixers; Dunellen, N. J.

513 Raymond Bros. Impact Pulverizer Co.; 145 Laflin St., Chicago.

530 Roebling Construction Co.; Fireproofing; Fuller Bldg., New York.

538.3 St. Louis Portland Cement Co.; St. Louis, Mo.

538.7 Sandusky Portland Cement Co.; Waterproof Compound, Portland
Cement, White Portland Cement; Sandusky, Ohio.

548 Scofield Engineering Co.; Reinforcing Bar; Arcade Bldg., Phila-
delphia.

559 Sicilian Asphalt Paving Co.; Trinidad Rock Asphalt; 41 Park Row,
New York.

565.5 Smith, T. L. Co.; Mixers; 308 Old Colony Bldg., Chicago.

566.7 Snell, R. Z. Mfg. Co.; Mixers; South Bend, Ind.

569 Snyder, Hiram & Co.; 261 Broadway, New York.

583 Standard Asphalt & Rubber Co.; Liquid Coatings; 205 LaSalle St.,
Chicago.

604.5 Sturtevant Mill Co.; Stone Crushers; Boston, New York, Pittsburgh,
St. Louis, Chicago.

606.5 Svenson-Shuman Machine Co.; Mixers; 602 Bessemer Bldg., Pitts-
burgh, Pa.

616 Thorn Cement Co.; Prudential Bldg., Buffalo, N. Y.

620 Tompkins, Calvin; Broken Stone; Whitehall Bldg., 17 Battery
PL, New York.

622.5 Traylor Engineering Co.; Crushing Machinery; Allentown, Pa.

624.5 Trussed Concrete Steel Co.; Kahn System, etc.; Detroit, Mich.

631.5 United States Equipment Co.; Rock Crushers; 1201 Fisher Bldg.,
Chicago.

634.5 Universal Portland Cement Co.; Commercial Bank Bldg., Chicago.

634.7 Universal Road Machinery Co.; Crushers; 120 Liberty St., New York.

642 Vulcanite Paving Co.; Land Title Bldg., Philadelphia.

643 Vulcanite Portland Cement Co.; Philadelphia and New York.

644 Warner-Quinlan Asphalt Co.; Trinidad Asphalt; 4 Warner Bldg.,

Syracuse, N. Y.
657 Western Cement Co.; Louisville, Ky.

664.8 Wight, W. N & Co.; Lock-Woven Steel Fabric; 7 W. 38th St.,

New York.
668.5 Williams Pat. Crusher & Pulverizer Co.; Old Colony Bldg., Chicago.



BIBLIOGRAPHY.

BIBLIOGRAPHY.

Abbreviations.

A D. Appleton & Co.. 1, 3 & 5 Bond St., New York, N. Y

A B Allyn & Bacon, 33 Union Sq., New York.

B Henry Carey Baird & Co., 810 Walnut St.. Philadelphia Pa

A C Archibald Constable & Co., Ltd., 16 James St., Haymarket, London.

B C Adam & Chas. Black Co., Soho Square, London.

C G Charles Griffin & Co., Limited, Exeter Street, Strand, London.

C H Chapman & Hall, 11 Henrietta St., Covent Garden, London W C

C L Crosby Lockwood & Son, 7 Stationers' Hall Court, London, E. C.

E N Engineering News Publishing Co., 220 Broadway, New York, N. Y

G Ginn & Co., Boston, Mass.

L J. B. Lippincott Co., Philadelphia, Pa.

L G Longmans, Green & Co., 91 & 93 Fifth Ave., New York, N. Y.

M The Macmillan Company, 66 Fifth Ave., New York, N. Y.

McG McGraw Publishing Co., 239 West 39th St., New York.

R G Railroad Age Gazette. 83 Fulton St., New York, N. Y.

S C Spon & Chamberlain, 12 Cortlandt St., New York, N. Y.

S' L Sampson, Low, Marston & Co., London.

U. S. U. S. Government Printing Office, Washington, D. C.

V N D. Van Nostrand Co., 23 Murray St., New York, N. Y.

W John Wiley & Sons, 43 & 45 E. 19th St., New York, N. Y.

W W Wm. Wood & Co., 51 Fifth Ave., New York, N. Y.

620.1 Strength of Materials.

Barlow, Peter . A Treatise on the Strength of Materials. New Ed.,

Revised by P. W. Barlow and W. H. Barlow. Edited by Wm. Humber.

400 pp. 19 plates and numerous cuts. 8vo. Cloth. $7.00. C L.
Bovey, Henry T. . Strength of Materials and Theory of Structures. 4th

Ed., Rewritten and Enlarged. 981pp. 943 ills. 8vo. Cloth. $7.50. W.
Box, Thomas . A Practical Treatise on the Strength of Materials.

4th Ed. 536 pp. 27 Plates, Numerous Tables. 12mo. Cloth.

$5.00. 1905. S C, B.

Burr, Wm. H. . The Elasticity and Resistance of the Materials of En-
gineering. 6th Ed., rewritten and enlarged. 1100 pp. 8vo. Cloth.

$7.50. 1904. W.

Kent, William . Strength of Materials. 2d Ed. 18mo. Boards.

$0.50. 1905. V N.
*Merriman, Mansfield . The Strength of Materials. 4th Ed. Revised.

156 pp. 48 figs. 12mo. Cloth. $1.00. W.

Robinson, S. W. . Strength of Wrought-Iron Bridge Members. 18mo.

Boards. $0.50. 1905. V N.
Spangenburgh, Ludwig . The Fatigue of Metals under Repeated

Strains. 18mo. Boards. $0.50. 1905. V N.
Winslow, Benj. E. . Tables and Diagrams for Calculating the Strength

of Beams and Columns. 53 pp. 19 full-page plates. 12 X 9, oblong.

Cloth. $2.00. E N.
Wood, De Volson . A Treatise on the Resistance of Materials. 328 pp.

129 figs. 8vo. Cloth. $2.00 W.

Woods, R. J. . Strength and Elasticity of Structural Members. 322

pp. 8vo. $3.50. 1905. L G.

691.3-5 Artificial Stone, Concrete, Cement.

*Eckel, Edwin C. . Cements, Limes, and Plasters: Their Manufacture

and Properties. 746 pp. 165 figs. 254 tables. 8vo. Cloth. $6.00.


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