EXPLANATION OP THE PLATES. 
377 
The Juno steam vessel with a pair of engines of 260 horses’ power, stationed 
between London and Cork, belonging to the St. George Steam Packet Company. 
The Vulture steam vessel with a pair of engines of 260 horses’ power, stationed 
between London and Cork, belonging to the St. George Steam Packet Company. 
The Tiger steam vessel with a pair of engines of 300 horses’ power, stationed 
between Hull and Hamburgh, belonging to the St. George Steam Packet Company. 
The TVilberforce steam vessel with engines of 300 horses’ power, stationed between 
London and Hull, belonging to the Humber Union Steam Company. Engravings of 
the engines of this vessel are given in this work. 
The Kilkenny steam vessel with a pair of engines of 300 horses’ power, stationed 
between London and Waterford, belonging to the Waterford Commercial Steam Navi 
gation Company. 
The Windermere steam packet with a pair of engines of 60 horses’ power, stationed 
between Liverpool and Ulverstone, belonging to James Winder, Esq., of Liverpool. 
The Albatross steam packet with a pair of engines of 70 horses’ power, stationed 
between Hull and Yarmouth, belonging to Messrs. Boardman and Harmer, of Nor 
wich, and others. 
In addition to the engines above mentioned, a magnificent pair of engines of 500 
horses’ power, on board the British Queen steam ship of 1863 tons, will be, in the 
course of a short time, in operation between Great Britain and the United States. 
And another pair of engines of 500 horses’ power are making for the President, 
another vessel building for the British and American Steam Navigation Company, of 
2028 tons, being also for navigation between Great Britain and the United States. 
A pair of engines of 220 horses’ power are also now making for the Honourable 
the East India Company. 
In addition to the above, a considerable number of land engines are in satisfactory 
operation with Mr. Hall’s improvements, but it is not necessary to particularise them. 
The great importance of Mr. Hall’s improvements to steam navigation and to land 
engines, where water containing saline and other extraneous matters only can be pro 
cured for the condensation of the steam used in working engines, is strongly illustrated 
by extensive documentary evidence, corroborating the advantages that have been 
stated. 
For graphical explanation, see Plates XLIX. and L. 
3 b