IX. NAVAL ARCH1TK0TURE,. ETC. 511 



on his first exploration, sui.led in her from the Zambesi to Calcutta. The 

 " Lady Nyessa " was fitted with two propellers, one abaft the other on the same 

 shaft. 



Engines high pressure, cylinders 14 in. diameter, length of stroke 12 inches, 

 horse-power 25 nominal. 



2178ck. Model of the Screw Steamer " Bengal." 



Dimensions, length 297 ft., breadth 39ft., depth 27ft. 6 ins. 2,235 

 B.M. tons. David and William Henderson and Co. 



Built by the late firni of Tod & "McGregor in 1852, for the Peninsular and 

 Oriental Steam Navigation Co., lately trading in the China Seas. 



Engines beam geared, cylinders 80 inches diameter, stroke 5 feet, horse- 

 power 470 nominal. 



2178cl. Model of the Paddle Steamer " Trafalgar." 



Dimensions, length 190 ft., breadth 28 ft. 6 ins., depth 16 ft, 

 1 ins. 689 tons gross. David and William Henderson and Co. 



Built and engined by the late firm of Tod & McGregor in 1847, for Messrs. 

 Wm. Watson & Co., Dublin, for their Liverpool and Dublin trade, schooner 

 rigged. 



Engines oscillating, cylinders 69 inches diameter, length of stroke 5 feet 

 6 inches, horse-power 360 nominal. 



2178cm. Model of the Paddle Steamer " Princess 

 Hoyal." David and William Henderson and Co. 



Built and engined by the late firm of Tod & McGregor in 1841, for the 

 Glasgow and Liverpool trade ; wrecked in 1856, and a new paddle steam 

 vessel built in 1857 to replace her. 



Engines, steeple, cylinders 72 inches diameter, length of stroke 6 feet 6 

 inches, horse-power 400 nominal. 



2178cn. Model of the Paddle Steamer " Countess of 

 Galloway." Length 165 ft., breadth 24 ft., depth 14 ft. 3 ins. 



David and William Henderson and Co. 



Built and engined by the late firm of Tod & McGregor. Two vessels were 

 built from this model and of the same name, one in 1835 and one in 1843, 

 fitted up as passenger and cattle-boats plying between Liverpool and Wig- 

 town ; the latter vessel is still on her station, and is considered one of the best 

 cattle-boats afloat. Owned by the Galloway Steam Navigation Company, 

 rigged 3-masted schooner. 



Engines vertical, direct-acting, cylinders 54 inches diameter, length of 

 stroke 5 feet, horse-power 220 nominal, paddle wheel 22 feet diameter. 



2178co. Model of the Twin Paddle Steamer " Alli- 

 ance." Dimensions 140 ft. by 9 ft. 5 breadth of each hull, depth, 

 8 ft., distance between hulls, 12 ft., total breadth, 30 ft. 



David and William Henderson and Co. 



Propelled by one paddle wheel, 18 feet diameter, placed between hulls, 

 27 ft. 6 ins. abaft centre of vessel. The paddle wheel was afterwards taken 

 out of the centre and the two halves rivetted together ; since that alteration 

 she made several successful passages as a blockade runner during the late 



