(1891 May 2 : Chelsea Royal Naval Exhibition.

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truth ; and on its return to Portsmouth the watch was only in error
I min. 54-5 sec., equivalent to 18 nautical miles. In 1764 another voy-
age was made to Barbadoes, where it was found to be only 43 seconds
in error, equivalent to about 1 1 nautical miles. On its return it was
found to have gained only 54 seconds in the whole voyage of 156 days.
It has a plain balance, the effect of temperature on the balance and
spring being corrected by a compensation curb (brass and steel lamina)
acting on the spring.

John Harrison was born at Faulby, Yorkshire, 1693. He lived for
some time at Barrow, in Lincolnshire, as a carpenter. He devoted his
whole life to horology, and in 1 735 came to London, where he made
the two machines exhibited. Besides gaining the prize of ,20,000 for his
watch, he made many improvements in horology, and is credited with
the invention of the gridiron pendulum in 1726, and of the going fusee.
He died in 1776.

4264 Chronometer by Larcum Kendall, an apprentice to Harrison. This
was made on the pattern of Harrison's, as evidence that another maker
could construct a chronometer satisfactorily from Harrison's designs, in
accordance with the conditions of the award of ,20,000. Date. 1769-

4265 Chronometer by Larcum Kendall. Date, 1774. It is much less
complicated and has a spiral compensation curb.

Gallery] Navigation Section, 383

4266 (a and b} Two Chronometers by Thomas Mudge, made in 1795-6.
These instruments are of fine workmanship. Mudge was born in 1715*
died, 1 794. He invented the lever escapement.

4267 Chronometer, by John Arnold, fitted with a helical balance spring,
and a new form of escapement, both devised by Arnold himself. The
escapement is now superseded by that of Earnshaw. Arnold was born,
1744, died, 1799.

4268 Chronometer by Earnshaw, who invented the spring detent escapement
and compensation balance, both substantially as now used. Earnshaw
was born 1749, died 1814.

4269 Chronometer by E. J. Dent, shewing the balance invented by him-
Mr. E. J. Dent constructed the Westminster Clock. He was born 17901
died 1853.

4270 Chronometer by Eiffe, shewing the balance invented by him. Eiffe
was born 1800, died 1880.

4271 Chronometer by John Poole, fitted with an auxiliary compensation
to the balance devised by him. Bom 1818, died 1867.

4272 Chronometer by Loseby is fitted with a balance invented by the maker.
The effects of variation in temperature are counteracted by the
expansion and contraction of mercury in a pair of curved glass tubes
fixed at each end to a laminated rim.

4273 A Modern Chronometer by Kullberg, and fitted with his flat rim
balance. Mr. V. Kullberg, one of the most successful of modern
chronometer makers, was born in 1824, and died in 1890.

4274 Pocket Chronometer by Arnold.

4275 A Deck Watch by Ashley. The chief difference between this and
the pocket chronometer exhibited is that it is fitted with a lever escape-

4276 A Model of chronometer mechanism, shewing the action of the

4277 A Case containing a specimen of the chronometer balance in four stages
of its manufacture.

Lent by Mr. J. U. Poole. 33, Spencer Street, Clerkenwell.

to \ Withdrawn.





Priced Catalogues & Self-Measurement
Cards sent on application.

384 Navigation Section. [Cook

4287 A Marine Chronometer, with a glass balance spring and special

This is the invention and handiwork of the late Frederick Dent, ot
the Strand and Royal Exchange, and the only specimen in existence.
The spring requires far less compensation for any given change of
temperature than a steel spring would, and the balance, which is
composed of a glass disc, is compensated by two small compensation
laminae mounted upon it.

4288 A Chronometer by Pennington, Pendleton, and others, made fcr the
son of the inventor. No. 22, date 1796.

4289 A Collection of Marine Chronometer Balances of various types.

Lent by Messrs. E. Dent & Co.. 61. Strand.

4290 Chronometer of Captain Cook, used in his second and third voyages.

Lent by the United Service Institution.


4291 Automatic Sounding Machines, Lucas' Patent, 2 in number, viz. :
One for deep-sea soundings up to 5,oco fathoms with wire. One hand
machine for depths up to 400 fathoms, with wire, lead sinkers, and
snappers complete.

NOTE. The above two sounding machines are now in general use on
board H.M. Surveying Vessels.

Lent by the Telegraph Construction and Maintenance Company. Limited,
38, Old Broad Street, London.

4292 Rod, Sounding, Baillie, with hemp line sounding No. I and 3
sinkers, each cwt., as used on board I.I.M.S. "Challenger" (now-

4293 Blocks, Gin, Metal, Sounding, 5 in.

4294 Bottles, Stop Cock 1 , u r ,

4295 Bottles, Water Slip} as used ln Challen g er -

4296 Leads, Cup, 112 Ibs. \Formerly used with hemp sounding line No.

4297 Leads, Valve, 112 Ibs. / I for depths under 1,000 fathom?.

4298 Rod, Sounding, Baillie, for wire. This rod is now used with gauge,
20 galvanized wire, and Lucas Sounding Machines. Sinkers of 25 Ibs.
weight have been specially cast to use with this rod.

4399 Aldrich's Tube Sounding "Driver." This pattern tube has been
recently in use on board H.M. Surveying Vessel " Egeria," which has
been employed for two years in sounding operations in the Pacific
Ocean. It brings up exceptionally large specimens of the bottom.

4300 Stoppers for Wire. For holding the wire when making a splice or
putting on deep-sea thermometers.

Gallery] Navigation Section. 385

43OIA Rod, Sounding, Hydra

43010 ,, Fitzgerald

Various pattern sounding rods that have been successfully used in
deep-sea sounding operations, but are now obsolete.

Lent by the Hydrographic Department of the Admiralty.

4302 Balloon Buoy.

4302A. Buchanan's combined sounding tube and water bottle
43O2B ,, stop cock and water bottle.

4303 Combined sounding tube and water bottle.
4303\ Stallibrass' sounding tube and water bottle.
43038 Sigsbee's cutter sounding tube.

43030 Benest's combined sounding tube.

01 J

43030 Plumper sounder.

43O3E Buchanan's navigational sounding machines.

4304 Buchanan's Piezometer (A and B).
430 4 .v Piezometers.

4304B ,, mercury Piezometer.

43040 Hydrometers.

43040 improved Millers- Casella thermometers.

4305 Negretti & Zambra's improved frame standard deep sea thermometers.
43O5A. Casella's deep sea thermometer.

43053 Piece of First Atlantic Cable.

43050 Section of incrustation of Pollyzore from telegraph cables.

43050 Specimens of teredos from telegraph cables.

4305E Album of Photographs illustrating submarine telegraphy and

Lent by the India Rubber, Gntta Percha, and Telegraph Works
Company, at Silvertown.

4311 Thomas Mercer, St. Albaris, Herts, and London.

Marine Chronometers.

4312 Notie & Wilson, 156, Minnies, London.

A collection of Charts, Nautical Works, and Instruments ; also
specimens of Yachting requisites of special design and manufacture.

4313 Rowland Rugg, 15, Charing Cross, S. W.

Nautical Publications, consisting of Compass Cards, Cyclone and
Rule of the Road Diagrams, &c.

4314 Parkinson & Frodsham, 16, Queen Victoria Street, London.

Marine Chronometers, &c.

4315 R. H. Laurie, 53, Fleet Street, London, E. C.

Nautical Publications, Charts, and Sailing Directories.

386 Navigation Section. [Cook



4317 Magnetic Ore. Lent by the Lords Commissioners of the Admiralty.

4318 Loadstone, i8th century.

Lent by the Committee of the Liverpool Public Library.

4319 Chinese Compasses.

Lent by the Council of the Royal United Service Institution.

The Compass was used by the Chinese in times of remote antiquity.
In a simple form it was used by Mediterranean seamen in about the
beginning of the 1 3th century, and the Fly or Card was attached to the
needle about a century later.

4320 Japanese and Chinese Compasses.

Lent by the Committee of the Hartley Institute, Southampton ,

4321 Chinese Compasses.

4322 Chinese Compass and Sun Dial.

4323 Viatorium or Pocket Compass in ivory, by Leonard Miller, 1635.

4324 Table Compasses by Bugondas, and by Willebrand, Augsburg, I7th

4325 Compasses, i8th century.

4326 Compass and Sun Dial, cruciform, i8th century.

4327 Pocket Compass, Sun Dial, Lens, and Mirror, i8th century.

4328 Compass and Sun Dial by Stockert, Bavaria.

4329 Compass by Thomas Cave, Dublin.

Lent by the Committee of the Liverpool Public Library.

433 Gowland's Vertical Compass.

4331 6-inch Steering Compass.

4332 7i-inch Steering Compass.

4333 9i-inch Steering Compass.

4334 9^-inch Steering Compass. Transparent card, and showing old
mode of lighting from below.

4335 Steering Compass, by Walker.

4336 Steering Compass, by Sir Wm. Snow Harris, having a stout
copper ring to check the vibrations of the card.

4337 Steering Compass, Dent's Axis. The card moving on an axis
instead of on a pivot, always keeps parallel to the glass cover of the

4338 Azimuth Compass, old Naval pattern.

4339 Standard Compass, Admiralty Compass Committee.

Gallery] Navigation Section. 387

4340 Liquid Compass, Crow's, 1813. Card floated, expansion of fluid by
heat provided for by flexible leather bottom to compass bowl.

4341 Liquid Compass, Preston's. Expansion of fluid provided for by two
raised vessels.

4342 Liquid Compass, Dent's. Expansion of fluid provided for by air
chamber round upper part of bowl.

4343 Liquid Compass, Gray's, the liquid being between inner and outer

4344 Liquid Compass, West's. Bowl hermetically closed, expansion of
fluid provided for by flexible metal bottom to compass bowl.

4345 Liquid Azimuth Compass, latest Admiralty pattern.

4346 Liquid Azimuth Compass for Torpedo Boats.

4347 Walker's Boat's Compass.

4348 Dent's Life Boat's Compass.

4349 Dent's Boat's Compass, old pattern Binnacle.

4350 Dent's Boat's Compass, in low Binnacle.

4351 Dent's Boat's Compass, in low Binnacle, showing mode of lighting
by candles.

435IA Torpedo Boat's Steering Compass.

4352 Arctic Sledge Compass. Used in the Arctic Expedition, 1875.

4353 Arctic Small Azimuth Compass. Used in the Arctic Expedition, 1875.

4354 Arctic Large Azimuth Compass. Used in the Arctic Expedition,

4355 Earl of Caithness' Compass, showing a mode of fitting compass so
as to dispense with gimballing.

4356 Barlow's Correcting Plate, 1823. The first attempt to counteract
the effect of the iron of the ship on the compass.

4357 Correcting Spheres of Iron. Used to correct the quadrantal
deviation of H. M. Ship "Trident," 1856.

4358 Fox's Dip Circle and Table. For measuring magnetic force and
dip of the needle on board ship. Used on board H.M. Ship "Chal-
lenger," 187276.

4359 Small Instruments for measuring magnetic force on board ship for
the purpose of compass adjustment.

Lent by the Lords Commissioners of the Admiralty.
4359A Diagrams on Wall illustrating the magnetism of Iron Ships.

Lent by Captain Mayes, R.N.
43598 Beall's Compass Deviascope.

Lent by H. Hughes & Son, 59, Fenchnrch Street.


4360 Persian Astrolabe.

Lent by the Council of the Royal United Service Institution.
The Astrolabe came into use for measuring the sun's altitude at sea
towards the close of the 1 5th century. For this purpose it was suspended
by the ring at its circumference.

4361 Astrolabe, Planisphere, Hth century.

Lent by Mrs. E. C. Rimmington, Penrith, Cumberland.

388 Navigation Section. [Cook

4362 Astrolabe constructed for Sir Francis Drake. Presented to Green-
wich Hospital by King William IV.

Lent by the Lords Commissioners of the Admiralty.

4363 Astrolabiura, Hamburg, 1667.

Lent by Major P. H. Heivitt, 25, Argyle Road, Kensington, W.

4364 A Ring Dial or Astrolabe.

Lent by the Committee of the Hartley Institute, Southampton.

4365 Horological Circle.

Lent by Guy F. Fairfax, Esq., Billborough Hall, Billborough.

4366 Old Bearing Plate.

4367 Bearing Plate for use in Torpedo Boats.

4368 Azimuth Instrument or Palinurus.

Lent by the Lords Commissicmrs of the Admiralty.



4369 The Regiment of the Sea. By William Bourne, 1577. The first
English Book on Navigation.

Lent by the Council of the Royal Geographical Society.

4370 The Light of Navigation. By William Johnson, 1620.

Lent by the Council of the Royal United Service Institution.

4371 Practical Navigation, or an Introduction to the whole Art. Sixth-
Edition. By John Sellar, Hydrographer to the King. London, 1689.

Lent by John Bowing, Esq. , West Tilbury, Essex.

4372 The Whole Art of Navigation. Fifth Edition. By Captain
Daniel Newhouse, 1727.

Lent by Captain Hull, R.N. , Mamre, Marmora Road, Honor Oak, S. E.

4373 The Mariner's New Kalendar. By Nathaniel Colson, Student ia
the Mathematics, 1746.

Lent by Vincent Fox, Esq., R.N.R., Mertomille, The London Road,
Devizes, Wilts.

4374 Margett's Longitude Tables. Published 1794. Nelson's Autograph
on Title Page.

Lent by W. H. Cullen, Esq., Aberdeen House, York Grove, Peckham.

4375 The New Practical Navigation. Being an Epkome of Navigation, &c.
Fifteenth Edition. By John Hamilton Moore, 1801.

Lent by A. T. Spriggs, Esq., 65, Gleneldon Road, Streatham, S. IV.

4376 Raper's Navigation. First Edition, 1840. Nineteenth Edition, 1891.

Lent by Messrs. J. D. Potter, 31, Poultry, E.G.


4377 Common Deep Sea Lead and Line. The most simple, most reliable,
and probably the most ancient instrument of Navigation.

Gallery] Navigation Section. 389

4378 Sounding Machine, Butt's, 1814. The sounding line runs through
a spring nipper attached to a bag filled with air, and so floating. When
the tension is off the line, by the lead striking the bottom, the spring
nips, and the line may be hauled in, the nipper remaining attached to
the point in the line indicating the depth of water.

4379 Sounding Machine, Massey's, 1820. Depth of water registered by.
revolution of geared wheels caused by fan-like blades passing through
the water.

4380 Sounding Machine, Walker's. Same principle as Massey's.

Lent by the Lordf Commissioners of the Admiralty.

4380A James Syndicate, Limited, 18, Biliter Street, London, E. C.

James' Patent ' ' Sentry " Sounding Machine and Automatic Shoal
Indicator, with Appliances, Model and Diagrams illustrating mode
of use.


Common Log and Line. This log consists of a piece %f wood,
generally the sector of a circle, so weighted as to float deeply and verti-
cally, and so slung as to keep at right angles to the ship's course, and
consequently in nearly the same place, as the ship goes on. A small
line being attached to the log, the speed of the ship is known from the
amount of line run out in a given time. This form of log is in common
use, and has been so for more than three centuries.

4382 Log, Wood, Fish-shaped. Very old.

4383 Log, Brass, Tubular. 1828. Speed shown by the tension on the
line measured by a spring balance.

4384 Massey's Log. 1808. Invented by Mr. Edward Massey, of Stafford-
shire. The speed is registered by geared wheels turned by fan blades
on a floating vessel. It is the fii^t of logs and sounding machines
showing the speed or depths of water by these means.

4385 Walker's Harpoon Log. Same principle as Massey's.

4386 Walker's Taffrail Log. Same principle as Massey's, but the speed
is shown on a dial, so that it may be seen without hauling the log in.
A gong is sounded at regular intervals of distance.

Lent by the Lords Commissioners of the Admiralty.


4387 Brass Plummet Quadrant. For measuring altitudes.

Lent by the Council of the Royal United Service Instittttion.

43&7A Cross Staff. Came into use for measuring the sun's altitude at sea in
the beginning of the l6th century. It was superseded by Davis' Quad-
rant, or Back Staff.

Made by Hughes, Optician, Fenchurch Street , and lent by Captain Wm.
Mayes, R.N., 43, Tressillian Rd., St. John's, SJS.

4388 Davis' Quadrant, about 1732. Invented by John Davis, the dis-
coverer of Davis Strait. Came into use for measuring the sun's altitude
at sea at the close of the i6th century. It continued in general use till
superseded by Hadley's Quadrant.

Lent by the Rev. A. Horsburg, II, Granville Terrace, Edinburgh.

390 Navigation Section. [Cook

4389 Davis' Quadrant

4390 Hadley's Quadrant. From wreck of " Royal George." Invented by
Lieut. Hadley, R.N., 1731, and came immediately into general use,
superseding Davis' Quadrant.

4391 Reflecting Quadrant. 1741. This form of instrument is inferior to
Hadley's, and was but little if at all used.

Lent by the Council of the Royal United Service Institution.

4392 Hadley's Quadrant, by Culmer, London, 1786.

Lent by the Committee of the Liverpool Public Library.

4393 Quadrant in use in early part of present century.

Lent by H. D. Curtis, sy., 57, Eaton Square.

4394 Sextant. Used by Captain Fitzroy, R.N., H. M. Ship "Beagle"
in carrying a chain of meridian distances round the world for the
determination of the Longitude, 1831-36.

Lent by the Lords Commissioners of the Admiralty.


4395 Sand Glass or Hour Clock.

Lent by the Committee of the Hartley Institute, Southampton.

4396 Sand Glass, 14 sec. and 28 sec. For showing intervals of time when
heaving the log.

4397 Sand Glass, 14 sec. For showing intervals of time when heaving
the log. Lent by the Lords Commissioners of the Admiralty.

4398 Parallatic Rotunda for finding Longitude at Sea.

Lent by the Committee of the Liverpool Itiblic Library.

4399 Sinical Quadrant. Used for similar purpose as Gunter's scale.

Lent by the Council of the Royal United Service Institution.

4411 A. Clarkson, 28, Bartletfs Buildings.

Telescopes Achromatic Object Glasses for Telescopes. The
Dumpy Telescope.

4412 Henry Hughes & Son, 59, Fenchurch Street, London.
Improved Paget Standard Compass for Iron Ships.
The Azimeter or Bridge Azimuth Dial.

Improved Torpedo Boat Compass with Azimuth Indicator.

The Deviatometer.

The Pelorus.

Ship, Yacht, and Boat Binnacles and Compasses.

Cooper & Wiggell's Patent Deep-Sea Sounding Apparatus.

Patent Logs.

Lunar and other Sextants and Stands.

New Angle Sextant.

Improved Double Sextant.

New Sextant Binocular for Star Observations.

Gallery] Navigation Section. 391

4412 continued.

Artificial Horizons.

Station Pointers and Position Finders.

The Radiograph.

Improved Parallel Rulers and Dividers.

Improved Marine Aneroid Barometer.

Improved Observation, Chart Room and Cabin Lamps.

Marine Binoculars and Telescopes.

Various New Nautical Books and Forms relating to Navigation.

Evelyn's Patent Ship Clinometer.

Magnetic Force Instrument, by Captain Mayes, R.N.

4413 Henry Porter, pro Gary & Co., 181, Strand, IV.C.

Sextants (various). Theodolites for Marine Surveying. Artificial
Horizons. Station Pointers. Drawing Instruments. Thermometers
for Deep Sea. Aneroid Barometers. Magnetic Compasses. Dip
Circle. Telescopes. Binoculars.

4414 E. Dent & Co., 61, Strand, o^ 4, Royal Exchange.

8 in. Standard Fluid Azimuth Compass and Column Binnacle, with
correctors, lamp, and tripod for night bearings as used in H.M. Cruisers.

6i in. Ditto as used in H. M. Gun Boats.

6\ in. Ditto, without circle, as used in H. M. Torpedo Boats.

4* in. Fluid Compass in Trunk Binnacle, with Correctors, for use
in Conning Towers, Steerages, &c.

4^ in. Fluid Torpedo Steering Compass, in Japanned Copper.
Binnacle, as used in Torpedo Boats.

4j hi. Boat Compass in Patent Binnacle illuminated by candles.
(This Compass has been specially designed to meet the new
Admiralty requirements for Boats' Compasses.)

Fluid Compass in Small Copper Binnacle, as used in the Royal Navy
and by the Royal National Life Boat Institution.

4415 James Henry Steward, 406 5 457, Strand, London, IV.C.

Nautical Instruments, consisting of Naval Telescopes, Binocular
Marine Glasses, Improved Night Glasses, Douglas Hamilton's Patent
Marine Binocular, Steward's Improved Yachtsman Binocular, Pilot
and Boat Glasses, Telescopes, Yacht Compasses, Boat and Pocket
Spirit and other Compasses, Canoe Lamp, Signalling- Lamps, Model
Signalling Instructors for Flag and Lamp Reading, Model Signalling^
Telegraph, Aneroid and Mercurial Barometers for Ships' use, and

4416 Aitchison & Co., 47, Ft'tci Street, and 42, Bishopsgate Street Within,

Aitchison's Patent Collapsing Binocular Glass.
Lenses for Optical Instruments.

^7 D. McGreg;or & Co., Nautical Instrument Makers, London.

Standard Azimuth Compasses, with recent improvements. Conning
Compass. Spirit Compasses. Torpedo-boat Compasses. Ships' Life-
boat Compasses. Ships' Recording Logs. Barometers. Position-.
Finders. Sounding Instruments, &c.

392 Navigation Section. [Cook

4418 Elliott, Brothers, 101 6 102, St. Martin's Lane, London, W. C.

Willis's Electrical Engine Room, Steering, and Revolution Telegraphs.
Spratt's Speed and Direction Indicator. Granville's Electrical Log.
Fiske's Electrical Range Finder. Electrical and other Instruments.

4419 Heath & Co., Limited, 115, Cannon Street, London, E.C.

Nautical Instruments. Smith & Heath's Patent "Reliable" Com-
pass and Binnacle. Heath's Patent " London Polaris " (for accurately
determining the position of a ship's course without tables). Heath's
Patent " Binnacle Tripod Course Corrector." Heath's Patent Liquid
Compasses. Heath's Patent Sextants. Heath's Patent "Argus"
Binocular Glasses.

4420 Thomas Walker & Son, 58, Oxford Street, Birmingham.

Ship Logs. Sounding Machines. Log Lines. Magnetic Bars (for
adjusting Ships' Compasses). Magnetic Needles (for Ships' Compases).

4421 James White, 16, 18 ana '20, Cambridge Street, Glasgow.

Sir Wm. Thomson's Standard Compasses, Admiralty, Merchant
Service, and Yacht's Pattern.

Ditto. Torpedo Boat Compass.

Ditto. Navigational Sounding Machines, two patterns.

Marine Voltmeter.
Marine Ammeter.

Sails, Flags, Shipchandlery.




sAiis,^ F-E&GS, A^B BimiMSfe,

Gold Medal, International Exhibition, London, 1885.

First Order of Merit and Bronze Medal, International Exhibition, Adelaide, 1887.

First Class Award, Centennial Exhibition, Melbourne, 1888.

Telephone !N"o. 4445.
Telegrapliio Axldress " L-AJXTE, 3S~EEVE, LCXNTDOIN".'



Contractors to the Trinity Corporation, P. and O., Royal Mat'l,
and other S.S. Companies.


Gallery] Models Section. Sub- Division Boat Lowering & Life Saving. 393



4422 James Beynon, 86, Janson Road, Stratford.

Working Model of improved method of, and appliances for, Housing
and Launching Ships' Boats. (The Model, together with patterns for
castings, were made by the Inventor.)

4423 Dr. T. S. Hosford, 33, King Street, Guildhall, London, E. C.

Boat Lowering Apparatus, with automatic or hand detachment for
use when the boat is water-borne.

4424 John Goodridge, I.N.A., Port wood, Southampton, Hants.

"The Goodridge Collision Stop-Gap."

4425 Alfred C. Stockwell, I, Retreat Villas, Catford, S.E.

Model of Collapsible and Reversible Life Raft. Model of Collaps-
ible and Reversible Life Boat Raft.

4426 Henry Farquhar Holt {Chairman of Committee, Shipmasters' Society),
60, Fenchiirch Street, London.

Half Block Model of H.M.S. "Dictator," 64 guns, built 1778.

Half Block Model of Ship " Hindostan," 1832.

Model of Boat, with lowering and disengaging gear.

Model of Ship's Boat fitted with necessaries.

Models of Standard Formulae of Spherical Trigonometry.

4427 John Bond & Son, Bond's Wharf, Orchard House, Blacfavall, E.

Clifford's Patent Boat Lowering and Releasing Apparatus.

4428 Mr. F. Brewster (trading as The Unsinkable Boat Company),

3, College View, Wharf Road, Cubitt Town, E.
(i.) Outside Buoyancy for Ship's Boats (special design for boats of H.M.

(ii. ) Life-jackets (special designs for ordinary use and for Torpedo Service

in H. M. Navy),
(iii.) "Cork Concrete" as substitute for metal and other air tanks in

Online Library(1891 May 2 : Chelsea Royal Naval ExhibitionOfficial catalogue & guide → online text (page 44 of 65)