.504 SEC. 12. APPLIED MECHANICS. 



2178ag. Models of the " Corcovado," " Puno," and 

 " Britannia," 1872. Length 375 ft., breadth 43 ft., depth 

 33 ft. 9 in. 3,434 tons. 600 horse-power. Laird Brothers. 



Type of screw mail aud passenger steamer of present date. 



Built for the mail and passenger service of the Pacific Steam Navigation 

 Company. 



The " Corcovado" made her first voyage from Liverpool to Callao, 11,003 

 knots, in 33| days, equal to a mean speed of 13*54 knots. 



SUNDBY MODELS AND PLANS. 



2178ah. Model of Bow of Vessel, showing bow rudder, 

 with guard on. Patent taken out by the late Mr. John Laird in 

 1843. Laird Brothers. 



Very generally adopted for all double-ended river steamers, and fitted in 

 several paddle-wheel gun vessels. 



2178ai. H. E. I. Co. " Napier," 1843. Length 160 ft., 

 breadth 24 ft., depth 5 ft, 446 tons. 90 horse-power. 



Laird Brothers. 



Built for the Hon. East India Company on a plan patented by Mr. Laird in 

 1843, with a spoon-shaped bow, and lifting dead wood and rudder. 



This form of vessel combines speed, light draught of water, and good steer- 

 ing, with great carrying capacity, and was found to answer so well for the 

 difficult navigation of the River Indus that a large number of river steamers 

 were afterwards constructed by Mr. Laird for the Hon. East India Company 

 on same system. 



2178aj. Model prepared by the late William Laird, Esq., in 

 1836, to show application of the screw propeller to a frigate or 

 troop ship of large size. Laird Brothers. 



2178ak. Picture of the "Rainbow," 1837. Length 

 185 ft., breadth 25 ft., depth 11 ft. 9 ins. 581 tons. 180 horse- 

 power. Laird Brothers. 



Paddle steamer for passenger and cargo service, built for the General Steam 

 Navigation Company of London, for service between London and Ramsgate. 

 After being employed in London and Antwerp trade for some time, the 

 " Rainbow," which was the fastest vessel of her day, ran for many years as a 

 cargo steamer between Havre and London, and was in service till 1869. 



2178al. Picture of H.M.S. " Soudan," " Albert," and 

 " Wilberforce," 184O. Length 138 ft, breadth 27 ft., depth 

 8 ft, 8 ins. 459 tons. 70 horse-power. Laird Brothers. 



Built for H.M. Government for the exploration of the River Niger. 



2178am. Picture of the Perry Steamer " Nun," 184O. 



Length 105 ft., breadth 20 ft., depth 8 ft. 9 ins. 187 tons. 60 

 horse-power. Laird Brothers. 



The picture shows the " Nun " grounded on the stone pier at Birkenhead, 

 her after end resting on the pier, and her bow on the bare rock below, the 

 distance between the points of support being 81 ft. ; the whole weight of the 



