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completely supplanted the lateen yard, probably through the inconvenience
of the latter, and the difficulty in working it.

The vessel is shown carrying three poop lanterns and a lantern in the
maintop, these giving by night the distinguishing mark of a flag officer's
ship. Across the forecastle is a " fish-davit " a spar used in the 18th century
for fishing the anchors ; in the Naval Expositor (1752) it is thus described :
" A piece of timber in a ship, having a notch at one end, in which by a strap
" hangs a block called the fish-pendant block, the use of which is to haul up
" the nook of the anchor, in order to fasten it to the ship's bow ; this davit
4t is shiftable from one side to the other as occasion requires."

Armament : Lower deck, 26 32-prs. ; main deck, 26 24-prs. ; upper
deck, 12 12-prs. Her complement was 500 men.

Tonnage, 1,374 tons ; length on gun-deck, 159 '5 ft. ; length of keel,
131 ft. ; breadth, 44-5 ft. ; depth, 19 ft.

45. Built model of H.M.S. " Queen Charlotte." (Scale 1 : 48.)
Lent by Hyde Clarke, Esq., D.C.L., 1881. N. 1561.

This 100-gun three- decked line- of -battle ship was designed by Mr. Edward
Hunt, as a sister ship to the " E/oyal George," and launched at Chatham in
1790. She was Lord Howe's flagship in the action off Brest, 1st June.
1794, and was accidentally burnt off Leghorn in 1800.

The armament was : Lower deck, 30 32-prs. ; middle deck, 28 24-prs. ;
main deck, 30 18-prs. ; quarter-deck, ten 12-prs. ; forecastle, two 12-prs.

Tonnage, 2,286 tons ; length, 190 ft. ; breadth, 52 5 ft. ; depth of hold,
22-3 ft.

46. Oil paintings of an English warship. Presented by
F. A. B. Bonney, Esq., 1865. N. 1046.

This represents a third-rate battleship mounting 64 guns. The paintings,
which are on copper, were used in the royal nursery for the instruction of
Prince William Henry, afterwards William IY.

Armament : Lower deck, 26 24-prs. ; main deck, 26 18-prs. ; quarter-
deck, ten 9-prs. ; forecastle, two 9-prs. Her complement was 500 men.

The leading dimensions of such a ship would be about : Tonnage, 1,374
tons ; length, 159'5 ft. ; breadth, 44 -5 ft. j depth of hold, 19 ft.


47. Sepia drawing of a felucca and H.M.S. " Sanspareil "
(1794). Received 1890. N. 1841.

This drawing, by J. T. Serres (b. 1759, d. 1825), represents a longitudinal
section of a felucca, a small decked vessel in general use in the Mediterranean.
Such craft have usually two masts carrying lateen sails, and there is
frequently a rudder at each end.

The " Sanspareil " was an 80-gun ship, captured from the French on
June 1st, 1794, and broken up at Devonport in 1842. As the sketch was
made on June 24th, 1794, it probably represents the dismasted ship as she
appeared on June 13th, when being towed into Portsmouth Harbour with
the six other prizes.

48. Rigged model of "Le Vengeur." (Scale 1:64.) Re-
ceived 1881. N. 1566.

This represents a French 74- gun line-of -battle ship sunk off Brest in
Lord Howe's action, 1st June, 1794. The model was made of bone by
prisoners of war confined in Porchester Castle in 1798.

The armament was : Lower deck, 28 36-pr. guns ; main deck, 30 18-pr.
guns ; quarter-deck and forecastle, 16 8-pr. guns. Her complement was
690 men.

Tonnage, 1,750 tons; length, 170 ft.; breadth, 44 -5 ft. ; depth of hold,
22ft. ; draught, 21 -5 ft.

Weight of hull and masts, 1,437 tons ; total weight of ship and stores
for a six months' cruise, 3,548 tons.

49. Whole model of French three-decker. (Scale about 1 : 144.)
Lent by Vaughan Pendred, Esq., 1876. N. 1419.

This model in bone was made by French prisoners during the Peninsular
War of 1807-14. It represents one of the largest first-rate ships of that
period, probably a similar vessel to the " Commerce de Marseilles," a 120-gun
line-of-battle ship captured at Toulon in 1793, which had the following
dimensions : Tonnage, 2,747 tons ; length, 208 '33 ft. ; breadth, 54 '83 ft. ;
depth of hold, 25 ft. Armament : Lower deck, 34 32-prs. ; middle deck,
34 24-prs. ; main deck, 34 12-prs. ; quarter-deck, 14 12-prs. ; forecastle,
four 12-prs. Her complement was 1,100 men.

50. Rigged model of H.M.S. "Ajax." (Scale 1 : 24.) Pre-
sented by Admiral the Earl of Hardwicke, R.N., F.R.S.,
1865. Plate II., No. 6. N. 1044.

This represents a 74-gun line-of-battle ship laid down at Messrs. Randall's
yard, Botherhithe, in 1795, and launched in 1798. She took part in the
battle of Trafalgar, 1805, and was accidentally burnt near the Dardanelles
two years later, when forming one of Sir J. Duckworth's squadron for forcing
that channel. The model was constructed by Sir Joseph Sydney Torke,
Bart., between the years 1797-1808.

Her armament was : Lower deck, 28 32-prs. ; main deck, 30 24-prs. ;
quarter-deck, 14 9-prs. ; forecastle, two 9-prs. Her complement was 540

Tonnage, 1,953 tons; length, 182 -25ft.; breadth, 49 '25 ft.; depth of
hold, 21 -25 ft.

51. Rigged model of French warship " Heros." (Scale 1 : 96.)
Lent by Mrs. Scott, 1904. N. 2350.

This represents a 74-gun line-of-battle ship which was present at the
battle of Trafalgar and afterwards escaped to Cadiz, where she remained
several years ; the model, which is made of bone, possesses considerable
detail and is believed to have been the work of some of the crew. It shows
the two long boats carried in a well in the waist, from which they were
hoisted out by the yard tackles, a method of working which remained in

B 2


general use till the adoption of derricks or davits ; for many years, however,
it had been usual to carry a boat in davits at the stern, as represented.

The armament was : Lower deck, 28 36-prs, ; main deck, 30 18-prs. ;
quarter-deck and forecastle, 16 8-prs. and on the poop six carronades, which,
however, were not counted in the classification. The ship's complement was
690 men.

Tonnage, 1,680 tons ; length of keel, 145 ft. : breadth, extreme, 46 ft. ;
depth of hold, 22 ft.

52. Built model of armed cutter. (Scale 1 : 16.) Lent by
Messrs. Linton Hope & Co., 1903. N. 2339,

This is a shipbuilder's model representing the lines and details of the
planking of a small armed cutter of the period 1775-1825. The vessel had
a full body forward, with a sharp clean run aft, leaving practically no
parallel length amidships, and was an extreme example of a general form
which was popular with builders of fast sailing craft before 1845 ; the lines
of the model also bear a close resemblance to those of the Southampton
fishing " hoys " famous about 1820 for excellent sailing and sea-going

Her armament probably consisted of from 6 to 10 light guns or swivels
and her principal dimensions would be : Tonnage,, 45 tons ; length,
on deck, 41 ft. ; breadth, extreme, 17*5 ft. ; draught, mean, 9 ft.

53. Sheer draught of H.M.S. " Endymion." (Scale 1:48.)
Presented by H. Y. Powell, Esq., 1886. N. 1702.

This shows the complete lines of this frigate, built in 1797 from the lines
of the French frigate " Pomone." The "Endymion" was considered to be
one of the fastest vessels in the navy during the reign of George III., and was
broken up in 1860.

Armament : Although rated as a 40-gun sliip, she frequently carried
46, arranged as follows : Main deck, 26 24-prs. ; quarter-deck, 18 32-pr.
carronades ; forecastle, two 9-prs. Her complement was 320 to 350 men.

Displacement, for foreign service, 1,695 tons ; displacement, for home
service, 1,594 tons; length on lower deck, 159*25 ft.; length of keel y
132-3 ft.; breadth, extreme, 42 ft.; breadth, moulded, 41'3 ft.; depth of
hold, 12 3 ft. ; area of midship section, 510 sq. ft.

54. Rigged model of H.M.S. "Caledonia." (Scale 1:60.)
Lent by R. F. Harvey, Esq., 1888. N. 1806.

This 120-gun three-decked line- of -battle ship, designed by Sir "W. Rule,
was launched at Devonport in 1808. In 1856 she became the hospital ship
at Greenwich, and was renamed the " Dreadnought." When launched this
vessel had a square stern, which was afterwards rounded. In her time
people considered her to be the finest vessel of her class, and she was the
favourite ship of Admiral Lord Exmouth.

The model shows fidded royal masts, main and forestays snaked, the lead
of the mizen top- gallant and royal braces to the spanker gaff, fore and main
belly stays, double martingale, three spritsail yards, the boat stowed in the
waist, &c. The eight davits in the waist and on the quarters are probably
modern additions to the model.

Her armament was : Lower deck, 32 32-prs. ; middle deck, 34 24-prs. ;
main deck, 34 18-prs. ; quarter-deck, 16 12-prs. ; forecastle, four 12-prs. Her
complement was 875 officers and men.

Tonnage, 2,616 tons; length, 205 ft.; breadth, 54 -5 ft.; depth of
hold, 23 -1ft.

55. Rigged model of an English warship. (Scale 1 : 720.)
Lent by Harold Burke, Esq., 1894. N. 2025.

This represents an 80-gun line-of -battle ship of the period 1795-1813.
Although this model is so small, the rigging is remarkably accurate
and complete, even the " snaking " of the fore and main stays being


The armament was : Lower deck, 30 32-prs. ; main deck, 32 24-prs. ;
quarter-deck, 14 12-prs. ; forecastle, four 12-prs.

The approximate dimensions of the ship were : Burden, 2,000 tons ;
length, 184 ft. ; breadth, 50 ft. ; depth of hold, 22 ft.

56. Whole model of English frigate. (Scale 1 : 48.) Received
1885. N. 1563.

This represents a 50-gun vessel specially designed in 1813 to cope with
the more powerful frigates then being introduced abroad.

Her armament was : Main deck, 30 24-prs. ; quarter deck, 16 42-pr.
arronades ; forecastle, two 42-pr. carronades and two 24-prs. Her com-
plement was 480 men.

Her dimensions were approximately: Tonnage, 1,458 tons; length,
172 ft. ; breadth, 44 ft. ; depth of hold, 14 ft.

57. Whole model (Scale 1 : 288) and drawing (Scale 1 : 48)
of the " Duke of Kent." Presented by John Scott Tucker,
Esq., 1865. N. 1052-4.

This proposed four-decked line- of -battle ship to mount 170 guns was
designed by the late Mr. Joseph Tucker, Surveyor of the Navy, 1813-31.
The design, prepared in 1809, contained the following improvements, many
of which were afterwards adopted by Sir W. Symonds, viz. : A round bow,
.an oval or elliptical stern ; hawseholes in the middle deck ; quarter ports
for guns 011 each deck ; vertical stern post ; round rudder head ; reduced
rake of stern ; a greater proportional breadth of beam ; greater rise in floor
timbers ; greater elevation of ports from water line ; greater height between
decks ; greater weight of armament.

Proposed armament : Lower deck, 36 32-prs. ; lower middle deck,
36 32-prs. ; middle deck, 36 24-prs. ; upper deck, 38 18-prs. ; quarter-
deck, ten 12-prs. and six 32-pr. carronades ; forecastle, four 12-prs. and four
32-pr. carronades.

The model of this proposed vessel has its lower masts and bowsprit
stepped and a midship transverse frame (scale 1 : 24) is also shown.

The leading dimensions of the proposed ship were : Burden, 3,700 tons ;
length of gun-deck, 221 5 ft. ; length of keel for tonnage, 178 7 ft. ; breadth,
extreme, 62 -4 ft. ; breadth, moulded, 61'6 ft. ; depth of hold, 26 ft.

58. Built and rigged model of H.M.S. " Ariadne." (Scale
1 : 24.) Presented by Sir D. H. Macfarlane, 1883.

N. 1594.

This sailing frigate was built at Portsmouth in 1816, and sold out of
the service in 1841. The model is believed to have been constructed and
rigged under the supervision of Captain Marryat (the novelist), who com-
manded the vessel in 1828-30. It shows the main deck with its complete
battery, the flush upper deck with its hammock nettings, and 20 carronades ;
these small guns were not, however, counted in a ship's armament
until 1817.

Armament : Mam deck, 20 32-prs., six 18-prs., and two 9-prs. ; upper
deck, 20 32-pr. carronades. Complement, about 180 men.

Tonnage, 511 tons; length, 121-6 ft.; breadth, 31 '3 ft.; depth of
hold, 12 ft.

59. Rigged model of 120-gun ship. (Scale 1 : 120.) Lent by
H. Edenborough, Esq., 1901. N. 226o.

This represents a line-of-battle ship of the first rate at the commence-
ment of the 19th century, a class of which only four were constructed
in England between 1808 and 1827. The model probably represents the
" Prince Regent," launched at Chatham in 1823 ; another of the four was
the " Caledonia " (see No. 54).


The rigging of the model is very complete and shows fidded royal masts,
snaked fore and main stays, and sprit and sprit topsail yards in position ;
also the arrangements for working the boats. The whole of the hull of the
model is built, and the bottom is coppered ; the bow has the square forecastle,
which prevailed for many years and was only abandoned when it was
discovered that the flat surfaces were penetrated by grape shot more readily
than the rounded bow.

The armament was : Lower deck, 32 32-prs. ; middle deck, 34 24-prs. ;
main deck, 34 18-prs. ; quarter-deck, 16 12-prs. ; forecastle, four 12-prs_
Complement, 875 men.

Tonnage, 2,602 tons; length on gun deck, 205 ft.; length on keel,.
170-9 ft. ; breadth, extreme, 58 ft. ; depth of hold, 23-16 ft.

60. Built and rigged model of a Revenue cutter. (Scale 1 : 32.)
Received 1877. N. 1482.

This belongs to the period 1810-30, but the anchor, compass, davits,,
boats, and after skylight are later additions. She carries 14 guns and
4 swivels.

Tonnage, 130 tons; length, 85 ft.; breadth. 24 ft.; depth, 13-3 ft. r,
draught, 11 ft.

61. Rigged model of Service yacht. (Scale 1 : 48.) Presented
by J. J. Miller, Esq., 1894. N. 2030,

This represents a class of cutter used by the Admiralty about 1830 for
harbour service, as tenders to the flag ships ; similar vessels were also used
in the Customs service. They usually carried a mainsail, foresail, jib, and
gaff topsail ; also a yard for spreading a square sail when running before
the wind. The model was rigged in the Museum in 1902.

The approximate dimensions were : Tonnage (b.o.m.), 135 tons ; length
of keel, 68 ft. ; breadth, 20 ft. ; depth of hold, 8 ft.

62. Rigged model of H.M.S. "Vanguard." (Scale 1:48.)
Received 1889. Plate II., No. 7. N. 1822.

This 80-gun, two-decked vessel, built at Pembroke in 1835, was the first
line- of -battle ship constructed from the designs of Sir "W. Symonds.

Owing to the removal of some of the limitations that had been placed
upon the dimensions of vessels of the various rates, the " Vanguard " was
made broader in proportion to her length than any of her predecessors, and
was also given finer lines and more angular sections below the water-line.
These special features are, however, more clearly illustrated by the adjacent
models of the " Albion " and the " Fantome," by the same designer. She
took part in the experimental trips of H.M. ships in 1836-46, and showed
comparatively good speed and handiness under sail, but had a tendency to
pitch in a head sea and to roll deeply when before the wind.

The model is built throughout and copper fastened ; it was rigged in
the Museum in 1903 in accordance with the table of , standard dimensions
for masts and yards prepared by Sir "W. Symonds. Adjacent to- it is
represented the temporary cradle and ground- ways used in launching such
a vessel.

The " Vanguard " carried 650 men, and her armament consisted of :.-
Lower deck, 20 32-prs. and eight 8-in. guns ; main deck, 24 32-prs. and
four 8-in. guns ; quarter deck and forecastle, 24 32-prs.

Tonnage (b.o.m.), 2,609 tons; length on lower deck, 190 ft.; breadth^,
extreme, 57 ft.

63. Rigged model of H.M.S. " Fantome." (Scale 1 : 39.)
Received 1888. Plate II., No. 8. N. 1809.

This brig-rigged sloop-of-war was launched at Chatham in 1839, and
sold out of the Navy in 1865. She was designed by Sir William Syinonds^.


who gave her the finer lines and steeper floors which he introduced into the
underwater form of British war vessels. At about the same time 13 similar
war brigs were also constructed.

This model was masted and rigged in the Museum in 1902-3, the masts,
yards, &c., being made in accordance with the dimensions established by
Sir W. Symonds in 1836.

The armament of the " Fantome " consisted of four 32-prs. and twelve
32 -pr. carronades, and her complement was 130 men.

Tonnage (b.o.m.). 485 tons ; length, on deck. 105 ft ; breadth extreme
33 -5ft. ; depth, 14 -8 ft,

64. Whole model of H.M.S. "Albion." (Scale 1:48.)
Received 1894. N. 2042.

This was a 90-gun sailing line-of-battle ship, designed by Sir W.
Symonds, and launched at Devonport in 1842. She took part in the bom-
bardment of Sebastopol in 1854, where she suffered most severely. In 1861
she was converted into a screw ship.

Her armament was : Lower deck, 28 32-pr. 56 cwt. guns and four 68-pr.
112 cwt. guns; main deck, 26 32-pr. 56 cwt. guns and six 8-in. 65 cwt. guns ;
<|uarter-deck, 16 32-pr. 42 cwt. guns and two 8-in. 52 cwt. guns; forecastle,
eight 32-pr. 42 cwt. guns. Her complement was 820 men.

Tonnage, 3,111 tons ; length, 204 ft. ; breadth, 60 ft, ; draught,
18 -75 ft.

65. Whole models of sailing corvettes. (Scale 1 : 48.)
Contributed by John Scott Russell, F.R.S., 1868.

N. 1276-7.

These vessels are designed on Mr. Scott Russell's " wave principle," but
have the following features advocated by Admiral E. G. Fishboume in 1845
as desirable in a sailing ship-of-war : The buttock lines are continuous
curves, to minimise pitching ; with the same object, a fine bow and a full
after-body are provided. To promote steady steering there is a long run of
perpendicular side, a long keel, a lean fore-foot, and a fine heel, while to
insure powerful action of the rudder the draught of water is greatest aft ;
the floor rises aft from the midship section.

Length on load water-line, 124 or 130 ft. ; breadth, extreme, 31 ft. ;
depth at side, 16 ft.

66. Half block model of H.M.S. "Recruit." (Scale 1 : 48.)
Received 1899. N. 2185.

This 12-gun brig was built of iron in 1846 at Blackwall by Messrs.
Ditchbum & Mare, and is interesting as being the first iron-built fighting
ship constructed for the British Navy.

She was designed to compete with a number of wooden brigs of the
same rating then under construction, but so strong was the prejudice against
the use of iron for war-vessels that the intended trials were never made, and
the " Recruit " was eventually sold out of the Service.

Although the new material was meanwhile adopted in troopships,
floating batteries, &c., it was not till 15 years later that iron construction
became general for battleships.

The principal dimensions were : Length on keel, 114*4 ft.; breadth,
30-6 ft. ; draught, 12 '5 ft. ; tonnage (b.o.m.), 462 tons.

67. Water-colour drawing of a frigate and a Revenue cutter.
Painted arid presented by W. F. Settle, Esq., 1890.

N. 1674.

The frigate is a 50-guii wooden vessel of the type constructed about
1850. It is represented under double-reefed topsails, foresail, jib, and
spanker, with the wind on her beam in a heavy sea. The cutter is running
before the wind with her jib and a square sail set.


68. Whole model of an armed schooner. (Scale 1 : 48.)
Received 1907. N. 2443.

This represents a small fast schooner, dated about 1850, fitted to carry
an armament of 18 light guns.

Her approximate dimensions were : Tonnage (b.o.rn.), 100 tons ; length
of keel, 68 ft. ; breadth, extreme, 19 ft. ; draught, mean, 8 ft.

69. Lithograph of H.M.S. " St. George." Received 1910.

N. 2538.

This lithograph by T. G. Dutton from a painting by W. H. Harvey, R.N..
represents the sailing three-decker " St. George " of 120 guns, as commissioned
for service with the Baltic Fleet in the operations against Russia in 1854.

The vessel was built of wood at Devoiiport about 1840 from the designs
of Sir "W. Rule and had the following dimensions : Burden, 2,710 tons ;
length, gun deck, 206 ft, ; breadth. 54 -6 ft. ; depth, 23 ft.

In 1859 she was converted to a screw-propelled two-decker carrying, at
first, 91 guns and afterwards 72 giins. She was removed from active service
in 1869.

70. Lithograph of mortar boats in action. Received 1905.

N. 2397.

This shows the early mortar boats " Firm," " Flamer," and " Hardy "
engaging the Quarantine Battery, Sebastopol, on August 15th, 1855.

At the outbreak of the Russian War, in 1854. a number of these small
shallow- draught vessels were rapidly built by various shipbuilders in the
United Kingdom, to the order of the British Admiralty, for operations
against land batteries in the Baltic and Black Seas. They each carried
amidships a single 13-in. mortar, weighing about 5 tons and throwing a
200 Ib. shell ; they were usually towed into action by steamers, but were
cutter or yawl rigged for independent manoeuvring if necessary.

Their approximate dimensions were : Tonnage (b.o.m.), 100 tons ;
length, 60 ft. ; breadth, 20 ft. ; depth, 6- 5 ft. ; draught, 3 ft.


71. Aquatint of H.M.S. " Terrible." Woodcroft Bequest, 1903.

N. 2313.

This paddle-wheel frigate, built of wood at Deptford in 1845, from the
designs of Mr. Oliver Lang, was, when first commissioned, one of the most
powerful steam war-vessels in the world. During the Crimean War she
took part in the operations around Sebastopol, and by her excellent steaming
qualities was enabled to weather the disastrous gale in the Black Sea
in 1854. In 1869 she assisted in towing the first Bermuda floating dock
(see No. 734) across the Atlantic.

The hull of the " Terrible " was specially constructed to resist the
stresses of her heavy armament and machinery, the timbers of the ship's
sides being so closely fitted and combined as to form a complete watertight
body before the external planking was added.

She was propelled by a set of direct acting engines of the twin cylinder
type, similar to those of the "Devastation" (see No. 808), made by Messrs.
Maudslay, Sons and Field; there were altogether four cylinders 72 in.
diam. by 96 in. stroke, and the paddle-wheels were 34 ft. diam. with floats
13 ft. wide by 2 6 ft. deep. Steam at 15 Ib. pressure was supplied by four
double-ended tubular boilers of box form, each with 6 furnaces. The
engines made 16 revs, per min., indicated about 2,000 h.p., and gave the
vessel a speed of 10 9 knots.

The original armament of 20 guns consisted of four 56-prs. (Monk's) and
four 68-prs. on each deck, together with three 12-prs. and a field piece.

Length (b.p.), 226 ft.; breadth inside paddles, 42 -5 ft.; depth in hold,
27 ft. ; burden (o.m.), 1,847 tons; displacement, 3.189 tons.

72. Rigged model of a paddle frigate. (Scale 1 : 48.) Made
and bequeathed by Elisha Davis, Esq., 1910. N. 2544.

This represents a steam frigate typical of the larger war- steamers built
about 1840 for British and foreign navies before the adoption of screw-

Her armament of 32 guns, probably 68-prs., is carried on two decks, and
includes two more powerful guns, on slides and traversing carriages, one at
each end of the vessel on the upper deck. She shows a single telescopic
funnel, and carries two special flat-bottomed boats as covers to her paddle-
boxes. She is fully rigged, for cruising under sail alone.

Approximate dimensions : Burden, 1,400 tons ; length, 210 ft. ; breadth,
between paddles, 40 ft.

This class of vessel was generally constructed of oak frames and teak
planking. Side-lever engines with flue boilers were largely fitted to the
earlier examples, while direct-acting engines and tubular boilers became
more common in later ships. Steam pressures were from 6 Ib. to 15 lb., and
the speeds varied from 7 to 12 knots with 500 to 1,000 indicated h.p.

73. Rigged model of HJLS. "Highflyer." (Scale 1:48.)
Received 1902. Plate III, No. 1. N. 2291.

This ship-rigged wooden corvette was built by Messrs. Mare & Co. at
Blackwall in 1850-1 from the designs of the Admiralty. She had two
complete decks and a short forecastle, and her lines were full at bow and
stem with but little rise of floor amidships. The guns were carried on the
upper deck, while the spaces between the decks were well ventilated through
a number of rectangular openings in the ship's side.

The " Highflyer " was one of the first warships fitted with a lifting
screw, and the model shows how this was carried out and the method in
which the wooden stem and rudder post were strengthened, by the addition
of metal strips and knees, against the stresses resulting from the working of
the screw propeller. The engines were of horizontal type, made by Messrs.
Maudslay, Sons and Field, and, during the trials on the Thames in 1852,
indicated 770 h.p. with a boiler pressure of 14 lb. and gave a speed of

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