Isthmian Canal Commission (U.S.).

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issue of The Canal Record. It gives a
detailed account of the progress of Canal work
in all departments and divisions.



Effect of Blasting on Slides.

In the investigation which is being con-
ducted by the Third Division of the Chief
Engineer's office, to determine the effect of
blasting on slides in Culebra Cut, the exper-
iments indicate that the "dobeying" or sur-
face blasting has little effect on the slides.
The investigation is being continued to deter-
mine the effect which varying charges of dyna-
mite at varying depths have on the banks of
the Cut. The progress report says:

"The 'dobey' shots seem to produce much
greater concussion of the air than* the deep
blasts. The deep blasts seem to produce
earth vibrations that extend well back from the
banks of the Canal, varying in intensity with
the character of the material, amount of
explosive used, etc.

"From the indications and observations
made on the banks during the several kinds
of blasting, it seems to be probable that the
'dobey' blasts have little effect on the banks,
beyond the possibility of displacing small
amounts of exposed material previously
loosened. It is thought, however, that the
concussion of the air produced by the 'dobey'
blasting is mainly responsible for the shaking
of houses and the damage resulting.

"The effect of this air concussion is plainly
shown by placing two barographs side by
side, one being fully exposed to the air and the
the other carefully protected, both, however,
being in similar positions regarding the ground.
It has been found that the first instrument
will show a distinct record, while a very slight
record, if any, will be shown on the other,
indicating that 'dobey' shooting does not



appreciably affect firm banks, and is, there-
fore, not initially responsible for sliding of
material.

"Particular attention is now being given
to the blasting south of the Empire bridge
and near the slide at old Culebra. Here it is
expected to get information regarding the
effect of blasting with different depths of
holes and amounts of explosives."



Atlantic Entrance Dredges.

After an experiment which continued about
a year it has been decided to equip all ladder
dredges at work in the Atlantic entrance with
five-sided top tumblers, to replace the four-
sided tumblers with which the dredges have
been equipped. It has been believed hereto-
fore that a tumbler with more than four sides
could not be used effectively, but experience
with the five-sided tumblers in dredging done
by the Japanese Government led to the adop-
tion of the new style. A cast iron tumbler was
made at Gorgona shops and it gave 160 days'
service as compared with 70 days' service for
the four sided tumblers. On the basis of
this experience, three of the new style tumblers
made of manganese steel were ordered, and
one of them has been installed on dredge No.
6. The other dredges will be equipped with
the new tumblers as soon as those now in
service wear out.

The seagoing suction dredge Caribbean has
returned to service maintaining the channel
in the Atlantic entrance, after three weeks in
dry dock during which it was given a general
overhauling.

Work has been begun on a derrick barge
which will be capable of handling 15-ton rock
for the Colon breakwater. It will be used in
placing the hard rock surface on the face of
the breakwater. The barge will be 90 feet
long and 42 feet wide, and will be constructed
of creosoted wood.



Excavating and Dumping.

On Saturday, March 11th, 51 shovels work-
ing in the Central Division excavated 78,293
cubic yards of material, or an average of 1,535
cubic yards per shovel for the S-hour working
day. This is the highest average output
per shovel ever made in the Central Division
for one day. On the same day, 49 Lidger-
wood trains and five small Western dump
trains, or a total of 54 trains, were unloaded
on the Balboa dumps, which is the greatest
number of trains unloaded at this place since
the commencement of work, the next highest
record being on September 14, 1910, when 47
Lidgerwood trains and three Western dump
trains were unloaded.



States are to the effect that the first shipment
of gate material will be made about the middle
of April, and the construction plant at Gatun
will be ready to begin the placing of it as soon
as it arrives.

A slide of about 2,000 cubic yards of soft
material from the east bank moved into the
site of the lower locks last week. The move-
ment was so rapid that the steam shovel
working at the toe of the bank was caught and
slightly damaged.



Repairs to Panama Railroad Ships.

The ships in the Panama railroad sen-ice
between New York and Cristobal will go into
dry dock for repairs, beginning March 31 and
continuing until about May 23. In order
that the repairs may be made without affect-
ing the regularity of the service the cement
carrying ships Ancon and Cristobal will be
put in the regular service, and the cement
service will be maintained by ships under the
present charter agreement. The Cristobal
will be in dry dock from March 31 to April 12,
the Allianca from April 14 to April 26, the
Colon from April 20 to May 2, the Panama
from May 3 to May 15, the Advance from
April 27 to May 5, the Ancon from May 18 to
May 23. The published schedule of sailings
will be changed from April 18 on ships leaving
New York, and from May 2 on ships leaving
Cristobal. The changes are noted in the
regular list of sailings published elsewhere in
this issue.



Gatun Locks.

False work for the erection of the lock gates
is being placed, and the construction of the
bridges over the locks for handling the gate
material is completed. Advices from the



Panama Water Supply.

A 12-inch suction pump will be installed
near the south end of the west toe of the dam
at Miraflores, with its intake located in the
old bed of the Cocoli River, for the purpose
of ridding the reservoir of the greater part
of its salt-impregnated contents. It has been
found, that the water covering the river bed,
which constitutes the deepest part of the
reservoir, was charged most heavily, and if
the supply pumps had been situated near
this spot, instead of at a considerable distance
from it, the water could not have been used
at all. Most of the leakage has been stopped
by "shooting" the soft material in the core
of the dam, thereby filling the crevices in the
toe, as it fell back into place again. Only
sufficient water to keep the pressure up is now
pumped into the 16-inch Panama main.

The water level in the Rio Grande reservoir
on March 15 was at about the same height as
on the corresponding date a year ago. This
is to a large extent due, however, to the auxil-
iary water supplies, viz., the Cocoli reservoir,
the Pedro Miguel River, and more recently,
since the use of the Cocoli Lake water has been
curtailed, the Caimitillo River. On January
1, 1911, the water in the reservoir was at about
238 feet above sea level, while on March 15
it was at about 230, showing a fall of eight
feet. The lowest stage recorded in the Rio
Grande reservoir was during the dry season of



234



THE CANAL RECORD



Vol. IV., No. 30.



NOTES OF PROGRESS.



( Continued. >



1907-OS, when it was 214, or 16 feet below the
reading of March 15.

The 12-inch pump situated on the bank of
the Pedro Miguel River is now supplying
approximately 900,000 gallons of water each
working day to the locomotive tank there,
and many engines that formerly watered at
Balboa take water at present at Pedro Miguel,
thereby further conserving the Rio Grande
storage. The Caimitillo River supply has
diminished considerably since the installation
of the pumping plant on its bank, at which
time the estimated flow was 3,000,000 gallons
in 24 hours. The absence of rainfall has dried
up the parent stream, and the present supply,
amounting to about 300,000 gallons a day,
comes from its principal tributary, the Cama-
ron River, and more particularly, from a
branch emptying into it in which there is said
to be a perennial flow.



Gatun Dam Spillway.

Two years ago, on March 17, the first con-
crete was laid in the spillway of Gatun Dam,
and this was the first permanent concrete
work to be done on the Canal. There have
been placed to date 126,278 cubic yards out
of a total of 250,000 cubic yards. Work is
advancing behind the coffer dams on either
side of the site of the spillway dam, and the
concrete has reached a height which places this
part of the work beyond danger from flood
during the rainy season. A statement of the
concrete work done during the week ending
March 18, follows:



Date.


Concrete
Laid.


Hours
worked.


No.
Mixeis.


March 13


Cm. Yd:-.
284
326
312
264
364
342


17:00
16:00
17:00
19:00
17:00
17:00


2


M irch 14. . .


2


March 15 ...


2


March 16


2




2




2






Total

Previously reported. . .


1.892
124,386


103:00






126.278





Ancon Rock Crusher.



Date.


Hours
wdfked.


Cubic
Yards.


March 13


9:40
9:30
9:25
9:40
8:55
10:15


3. 1 41


March 14






2,754




3 128


March 17


3 027


March 18


3 058








Total ....


57:25


18 016









Porto Bello Crusher.



Date.


Hours
worked.


Cubic
Yards.




6:05
7:42
7:16
6:09
6:27
6:34






3 '95


March 1 5






3.504




3 564


March 18


3,288








Total ....


40:13











The record of March 15 is the highest made by this
plant.

Visits of Congressmen.
The Congressional party which came to
the Isthmus on March 13, returned to the
States on March 19, after spending six days



inspecting the work of the Canal. It was
composed of the following members: W. P.
Borland, W. O. Bradley, C. H. Burke, J. VV.
Gudger, Jr., Paul Howland, J. R. Knowland,
J. W. Langley, E. W. Martin, J. A. Martin,
Bird S. McGuire, M. A. Morrison, F. W.
Mondell, J. C. Needham, A. B. Rouse, H.
Steenerson, S. W. Smith, E. T. Taylor, R. Y.
Thomas, F. E. Warren. A second party
sailed on the Panama from New York and



is due to arrive on the Isthmus on March 24.
In this party are: Congressmen Young and
wife, Alexander and wife, and Taylor and
wife.



Special Trains on Saturday Night.

A Saturday night train service between
Colon and Panama will go into effect on
March 25. The schedule is published else-
where in this issue.



CONCRETE WORK IN THE LOCKS.



GATUN LOCKS.

About 58 per cent of the concrete for the system of three twin locks at Gatun has been laid,
the exact amount in place at the close of work on March IS, being 1,199,691 cubic yards,
out of a total of 2,085,000.

A statement of the amount of concrete placed in the locks each day for the week ending
March 18, and of the total, follows; and a similar statement for the work in the spillway of
Gatun Dam is published elsewhere in this issue. The construction plant works 12 hours daily,
and the auxiliary plant 9 hours.



Date.


Construction Plant.
2-cubic yard mixers.


Auxiliary Plant.
2-cubic yard mixers.


Large

stone.


Total.




Concrete
placed.


Hours
worked.


No. ol

mixers


Concrete; Hours No. of
placed. 1 worked, mixers






Ou. Yds.
2.162
2.334
2,066
2.146
2.312
2.406


37:30
39:44
2S:48
34:16
38:40
37:23


6
6
6
6

6


Cm. Yds.\

794 8:40 | 2
670 8:40


Cm. Yds.
224}
210}
152

nil

2135
206J


Cm. Yds.
3.180}


March 14


3.214}
2.822


March 15


604 8 :04


2




576
772
682
348


8:40
8:40
8:40


2
2
2


2.893}


March 17


3.2975


March 18


3.294J




348




















Total

* '


13.426


216:21


6


4,446


52:00


2


1.178}


19.0505
1, ISO, 640}




















1,199,691 ',



*The 34S yards shown for the portable mixers are reinforced concrete, and were placed on the following days:
March 13th. 48 yards; March 14th. 61 yards; March 15th, 59 yards; March 16th. 61 yards; March 17th, 76 yards;
March 18th, 43 yards.

PEDRO MIGUEL LOCKS.

Concrete work in the locks at Pedro Miguel is over 69 per cent completed. 585,453 cubic
yards, out of a total of 837,400, having been placed at the close of work on March 18. The
record for each of the six 8-hour working days of last week, follows:





Construction P


LANT.

ters.


Auxiliary Plant.


Large
stone.




Date.


2-cubic yard mb


2-cubic yard mixers. J 5-cub


c yard mixer.


Total.




Concrete Hours
placed, worked.


No. of

mixers


Concrete
placed.


Hours No. of Concrete
worked, mixers Placed.


Hours
worked.


No of
mixers.




March 13.
March 14.
March 15.
March 16.
March 17.
March 18.


Cm. Yds.
860
838
974
822
920
1.004


14:110
15:00
15:00
15:00
14:00
15:67


2
2
2
2
2
2


Cm. Yds.
490
576
656
494
656
640


10:83
13:50
16:00
13:00
15:33
14:00


2
3
3
3
3
3


Cm. Yds.
125
119
122
150
148
142


7:75
7:50
8:00
8:33
8:67
7:50


1
1
1
1
1
1


Cm. Yds.


Cm. Yds.
1.475
1.5.53
1.752
1.466
1.724
1.786


Total
Previously
reported .


5,418


88:67


2


3.512


82:66


2.S3


g06


47:75


1


4,178


9,736

575 717






















Grand
total .


4,178


585.453



MIRAFLORES LOCKS.

Over 11 percent of the concrete for the system of locks at Miraflores was in place on
March 18, the total amount on that date being 158,191 cubic yards, out of a total of approxi-
mately 1,362,000. The record for each of the six 8-hour working days of last week, follows:





Auxiliary Plant.




Date.


2-cubic yard mixers.


J-cubic yard mixers.


i-cubic yard mixer.


Total.




Concrete
placed.


Hours
worked.


No. of
mixers


Concrete Hours No. of
placed, worked, mixers


Concrete
placed.


Hours
worked.


No. of
mixers


Large
stone.




March 13.
March 14.
March 15.
March 16.
March 17.
March 18.


204
188
220
226
352
320


4:50
4:00
5:00
5:00
8:00
7:33


2
2
2
2
2
2


389
698
719
540
785
SOI


26:00
37:25
36:50
27:00
40:25
37:75


4
5
5
4
6
5


48
78
77
42
68
85


6:00
6:50
6:00
3:50
5:50
7:00


1
1
1
1
1
1


5
20

15
5
5

15


646

984

1,031

813

1,210

1.221


Tot .1
Previously


1.510


33:83


2


3.932


204:75


4.83


398


34:50


1


65

3.610


5.905
152.286
























Grand


3,673


158.191,''





















March 22, 1911.



THE CANAL RECORD



235



RED CROSS ENDOWMENT.



Efforts to Raise Shapes Apportioned to Canal
Zone.

President Taft, as president of the American
National Red Cross, has undertaken to raise
an endowment fund of $2,000,000 to be imme-
diately available in cases of calamity. Five
hundred thousand dollars have already been
raised, and the State chapters are endeavoring
to supply the balance. The Canal Zone
Chapter has been called upon for $700, and
a series of entertainments will be held by the
various districts to raise that amount. The
first of these will be a vaudeville entertainment
at the National Theatre, Panama, on Friday
evening, April 7, under the auspices of the
Ancon, Pedro Miguel, Culebra, Empire, Las
Cascadas and Bas Obispo districts. Tickets
for this entertainment will be on sale at the
offices of the district quartermasters, the
Commission clubhouses, the Tiovli Hotel,
and at Vibert & Dixon's store, Panama.
Orders for boxes may be sent by mail to Dr.
A. J. Orenstcin, chairman, Ancon district,
Ancon, and should be accompanied by check
or post office money order for $10, United
States currency.

The Pedro Miguel district recently gave
a moving picture show in aid of the endowment
which netted $20.40.

A statement of the financial condition of
the Canal Zone Chapter, American National
Red Cross, for the month of February, follows:

RECEIPTS.

February 1. Balance on hand .... S1.S04.24
February 2. Eighty-sevenandone-

half per cent of net proceeds of

" sale of Christmas seals 53.92

February 28. Membership dues

received during month 71.00

February 28. Membership dues

received in connection with Red

Cross Ball. February 18 733.00

February 28. Other receipts from

Red Cross Ball 438.27

S3. 100.43

DISBURSEMENTS.

February 4. Postage (Letter of W.

N. Windes attached) $0.41

February 1. Relief of American in

Colon Hospital 25.00

February 1. Postage, receipt at-
tached 1.00

February 8. Remitted to treasurer,
National Red Cross. Washing-
ton, D. C, one-half membership
dues for quarter ending January
31 79.00

February 23. Relief of family of
Spanish contract laborer at
Chagrescamp 5.00

February 23. Postage, receipt at-
tached 2.00

February 27. Relief of destitute

American at Gatun 25.00

February 2S. Ribbon for badges,

for Ball .23

Total disbursements.' S137.64

February 28. Balance on hand $2,962.79

John L. Phillips, Treasurer.
Approved: C. A. Devol, Chairman.

Obituary.

John M. Hobrough died on March 13 as
the result of injuries received at the explosion
of a gasoline tank at Toro Point on the same
day. He was 23 years of age, single, and had
been on the Isthmus three and one-half
months. His father, Robert H. Hobrough,
lives at Everett, Wash.

Mrs. YVm. Shackleton, the wife of Wra.
Shackleton living at Bas Obispo, died on
March 13 at Ancon Hospital. She was 41
years of age and had been on the Isthmus
six months.



on the morning of March 16. The dynamite
gang had been loading a hole through a pipe
in the borrow pit north of the spillway and
were withdrawing the pipe when the explosion
occurred. Clifford Boyce and James Dunk-
ley, negro laborers, were killed. The injured
men were also negro laborers, and four of
them, Archie Wright, Andrew Maynard,
Oliver Grace and Edrick Trotman, were so
badly injured that they were removed to
Colon Hospital. Joseph Rock and Berkley
Williams were cared for in the sick camp at
Gatun, and Sinclair Hunt was so slightly hurt
that he returned to work.



PERSONAL.



Charles Francis Adams, wife and daughter
of Boston, Francis D. Millet and wife of New
York, Colonel R. H. I. Goddard and son of
Providence, O. H. Tittman and wife of Wash-
ington, Lieut. -Gen. S. B. M. Young, and Major
M. T. Davis, are in Panama inspecting the
Canal work. Maj.-Gen. Alexander Macken-
zie, Major W. Y. Judson and wife, Major
S. A. Cheney, and George R. Putnam are
among the passengers on the Panama, due
to arrive in Cristobal on March 24.

Dr. J. P. Perry has returned from his
annual leave in the States.



Changes in Canal Zone Judiciary.

A cable message from Washington under
date of March 18 announces the appointment
of W. W. Warwick, formerly Examiner of
Accounts in the Commission service, and
Thomas E. Brown, Jr., formerly district
judge at Cristobal, as associate justices of the
Canal Zone Supreme Court. W. H. Jackson
of New York, has been designated for the
position of district judge to succeed Judge
Brown.

K. of P.

Paradise Lodge No. 6, Knights of Pythias,
of Paraiso, will hold a "Good of the Order"
supper, for Knights only, in the Paraiso lodge
hall on Saturday evening, April 8. A special
train will leave Panama at 7.30, and from
Gorgona at 7.15 p. m., returning after the
supper.



Spanish War Veterans.

Colonel Sibert Camp, Spanish War Yet-
erans, will hold a regular meeting in the Gatun
clubhouse on Saturday, March 25. The char-
ter will not be closed until after this meeting.
and all Spanish War veterans desiring to
become charter members should be present.



Two Men Killed in Dynamite Explosion.
Two men were killed and seven injured in
an explosion of dynamite at Gatun spillway



Women's Clubs.

The Pedro Miguel Woman's Club will hold
a card party and reception on Saturday
evening, March 25, in honor of Mrs. Walter
H. Jennings, a charter member who is leaving
the Isthmus. On March 15 the social meet-
ing of the club was held at the home of Mrs.
T. T. Curran, at Empire. The next business
meeting will be held on March 22. after which
there will be no business meetings for three
months. The social sessions will be held as
usual on the second and fourth Wednesdays
in each month.

The home of the president of the Gorgona
Woman's Club was thrown open for the exhibit
of the federation pictures on Wednesday,
Thursday, and Friday of last week. The
large pictures were hung and the books and
portfolios were placed on tables. On Wednes-
day evening, the president entertained the



members of the Rebekah lodge. There was a
large attendance at the meeting on Thursday
afternoon. The program was informal and
consisted of readings on the 12 greatest
pictures in the world, and short sketches of
painters. Refreshments were served on the
veranda, which was decorated with palms and
flags.

There will be an initiation of 16 candidates
in the Rebekah lodge, Gorgona, on Friday
evening, March 24.



Fireproof Construction In Colon.

The fill in the newly improved section of
Colon is approaching completion, and, it is
expected that the construction of new build-
ings will be started there within the next four
months. The Health Officer of Colon has
called attention to the desire of a number of
the property owners to have a law enacted
by the municipal authorities limiting build-
ings in this new district to those of fireproof
construction. There is no field rock available
at Colon, as at Panama, and in order to erect
buildings of a permanent character, materials
will have to be brought from a distance.



Coal Screen.

A large screen to help in sorting coal at the
receiving pile at Mount Hope is being con-
structed at Gorgona shops. It will be erected
at the hoist by which the coal is conveyed
from the holds of ships to the storage piles.
Up to the present time lump coal for domes-
tic use has been sorted by hand. All the coal
at present used is bituminous.



Missing Men.
Any one having information regarding the
whereabouts of Nathan Gordon, who is sup-
posed to be on the Isthmus, is requested to
communicate with the General Superinten-
dent, P. R. R., Colon, R. P.



At a recent meeting of Paraiso Court, No. 5,
Independent Order of Panamanian Kan-
garoos, resolutions of sympathy were adopted
on the death of R. C. Smith, a member of
the court.

The Cristobal Marine Association and the
Cristobal Catholic Club have passed resolu-
tions of sympathy for J. K. Gibson, on the
death of his wife.



Cold Storage Prices.
There are -no changes in the prices of cold storage
articles from those quoted in last week's issue of The
Canal Record.



Misdirected Letters.

Ancon. C. Z.. March 22. 1911.
The following insufficiently addressed letters, origi-
nating in the United States and its possessions, have
been received in the office of the Director of Posts, and
may be secured upon request of addressee:
Arner, Otto Martin. Allmon

Ashley, Kendall Morton Martyn, E. M.
Benninger, M. P. McGowan. \Y. H.

Carroll. James Mcjimpsey, Alex.

Corsica. J. F. McLeod. John R.

Dominguez. Domingo Morris, T. J. (pkg.)

Dougherty, Bruce T Nichel, C.

Duffy, John J. O'Brien, James M.

Edwards, Mrs. Howard Overmeyer. Hon. John
Ford, Wesley Painter. Mrs. Judah

French, William S. Rice. Miss Eva C.

Gaillot. A. G. Ross. W. A.

Geiger, J. F. St. Clair. Mrs. Dan

Gloson, R. L. Sehr, Mr. Michael

Hackenburg, Mrs. Seymour. James

Nahck, Thos. S. Sherwood. Charles A.

Hamel. Will Smith. Jesse T.

Hobbs. Louise K. Smith. George (pkg.)

Hodina. Jo Snell. C. W. I.

Hyos, Valencia E. Stafford, Mrs. P. F.

Johns, Carl Stearns. Frank E.

Kehoe. Joseph Turner. Bert D.

Kieman. J. C. Wertz, Carl A.

King. Miss Bella Williams. Mrs. Clarena

Lewis. Mrs. E. B. Winford, Mrs. Edith T.

Marcotle, H. J. Woodward, Miss E.



236



THE CANAL RECORD



Vol. IV., No. 30.



CANAL WORK IN FEBRUARY.



Monthly Report of the Chairman and Chief Engi-
neer to the Secretary of War.

Culebra, C. Z., March 15, 1911.

The Honorable the Secretary of War.

Washington, D. C.

Sir: I have the honor to submit the fol-
lowing report of operations on the Isthmus
for the month of February, 1911:
Department of Construction and Engineering.

The following table summarizes the prin-
cipal items of construction work accomplished
by the Atlantic, Central and Pacific Divisions
during the month:



cubic yards in the amount of concrete laid ,
as compared with the figures for the preceding
month. The daily average for the 23 working
days was 3,135 cubic yards, as compared with
a daily average during January of 2,916 cubic
yards. The total amount of concrete placed
during the month was 72,103j cubic yards,
including 5,050j cubic yards of large stone.
The bucket measurement exceeded the place