In addition to the increase in dimensions, much improvement was made in the same year in the interior arrangements, and in the preservation of the timber of which ships were constructed. Up till this period both thick stuff and planks were prepared by charring the inner surface while the outer surface was kept wet, and this process was continued till the plank was brought to a fit condition for bending to the shape it was required to take. In this year, however, the process of stoving was introduced. It consisted in placing the timber in wet sand and subjecting it to the action of heat for such time as was necessary in order to extract the residue of the sap and to bring it to a condition of suppleness. In the year 1726 the process was favourably reported on by two of the master shipwrights in their report on the state of the planking on the bottom of the Falkland. Some of the planking had been charred by the old process, some stoved by the new, and the remainder had been neither stoved nor charred. The stoved planks were found to be in a good state of preservation, while many of the others were rotten. The process remained in use till 1736, when it was superseded by the practice of steaming the timber. The steaming and the kindred process of boiling remained in vogue during the whole of the remainder of the era of wooden shipbuilding. In 1771 the rapid decay of ships in the Royal Navy once more caused serious attention to be paid to the subject of the preservation of timber. It was, in consequence, arranged that larger stocks of timber should be kept in the dockyards, and that line-of-battle ships should stand in frame for at least a year, in order to season before the planking was put on. Similarly, frigates were to stand in frame for at least six months, and all thick stuff and planking was to be sawn out a year before it was used and stacked, with battens between the planks, so as to allow of the free circulation of the air. Similar regulations were put in force for the beam pieces, knees, and other portions of the ships.
Much trouble was caused by the injurious effects of bilge-water and foul air in the holds of ships, and various remedies were devised from time to time. In 1715 structural improvements were devised to allow of the bilge-water flowing more freely to the pumps, and trunks were fitted to the lower decks to convey air to the holds. In 1719 it was proposed that the holds of ships should have several feet of water run into them in the early spring in order to cool them, and that it should not be pumped out till August; but this remedy was never extensively practised. In 1753 Dr. S. Hales proposed a system of ventilation by means of windmills and hand-pumps, which produced excellent results. It was noticed that the accumulation of carbonic acid gas and foul damp air in the holds, not only set up rapid decay in the ship, but also most injuriously affected the health of the crews. Dr. Hales' system was employed in the Prince from 1753 to 1798, and it was considered that the durability of this vessel had been greatly increased. It was also reported by Lord Halifax that the mortality on the non-ventilated ships on the coast of Nova Scotia was twelve times as great as on those vessels which were fitted with Dr. Hales' appliances.
There are not many records in existence of the merchant-vessels of this period. Fig. [54] is a representation of an armed East Indiaman which was launched at Blackwall in 1752. Her length of keel was 108 ft. 9 in.; breadth, 34 ft.; and burthen, 668 tons. She was named the Falmouth, and was constructed by the famous shipbuilder, John Perry, of Blackwall Yard. She was commenced almost exactly two years before the date of her launch. Like all her class, she was heavily armed.
Fig. 54.—The Falmouth. East Indiaman. Launched 1752.
At the close of the war against France and Spain, which lasted from 1744 to 1748, great complaints were made of the weakness of our warships at sea. It was also found that the establishment of 1719 had not been adhered to, and the dimensions of ships were not fixed in accordance with any particular standard. The first defect was remedied by the placing of as many standards of wood, or iron, on the different decks as could be conveniently arranged, so as not to interfere with the guns, and by the use of larger bolts than had hitherto been employed, as high up as possible in the throats of the hanging knees. Also the beams of the quarter-deck and round-house were supported with lodging knees, and in some instances with hanging knees of wood, or iron. Various other pieces, such as the stem, were also strengthened and the weights of the taffrails and quarter-pieces were reduced. The advice of the master shipwrights of the various dockyards was sought, in order to fix a new establishment of dimensions, but great difficulties were found in introducing the much-needed reforms, and for some time afterwards the ships of the British Navy were at a disadvantage with those of foreign countries by reason of their contracted dimensions and inferior forms.
The capture, with great difficulty, of a Spanish ship of seventy guns, named the Princessa, in 1740, by three British men-of-war of equal rating, but far inferior dimensions, was one of the events that first opened the eyes of the Admiralty to the defects of their vessels. The first attempt towards introducing a better type of ship was made in 1746, when the Royal George, famous for her size, her services, her beauty and misfortunes, was laid down. She was not launched till 1756. The following were her principal dimensions:—
| Length of keel for tonnage | 143 ft. 5½ in. |
| Length of gun-deck | 178 ft. |
| Extreme breadth | 51 ft. 9½ in. |
| Depth of hold | 21 ft. 6 in. |
| Tonnage | 2047 |
| Number of guns | 100 |
| Crew | 750 men. |
Fig. [55] is an illustration of this ship. She rendered great services to the country under the orders of Admiral Lord Hawke, especially in the memorable defeat of the French Navy off the island of Belle-isle in 1759. She was lost at Spithead in 1782, when being inclined in order to have some repairs to her bottom executed. She capsized, and went under, 900 men, women, and children being drowned in her.