II. A FORM OF STEAM JOURNAL, 



REMARKS ON THE NECESSITY OF KEEPING A PROPER RECORD OF THE OPERATIONS 

 OF THE ENGINES IN ALL STEAM VESSELS, 



AND DIRECTIONS FOR MARKING THE STEAM JOURNAL, 



&c. &c. &c. 



BY THOMAS BALDOCK, LIEUT. R.N., K.T.S. 



IN order to obtain any USEFUL information of the comparative working of steam engines, it 

 is indispensable to ascertain the positive resistance which has been overcome, or the weight 

 that has been lifted ; but as this is a quantity which is ever varying when the engine is 

 employed in propelling ships, it is absolutely necessary to obtain a just estimate of the 

 retarding causes, and their occasional fluctuations. 



The action of a steam vessel's engines, supposing them in good order, will be found to 

 be diminished, and the speed of the ship retarded, according to the influence ; first, of the 

 wind ; secondly, of the waves ; and thirdly, according to the immersion of the ship in the 

 water, from her lading : if therefore a scale be formed of the proportionate power of these 

 obstructing causes, and a just record of their influence duly kept, together with an account 

 of the coal used, a tolerably correct estimate may be obtained of the comparative duty per- 

 formed, in proportion to the fuel consumed. 



To effect this object, and to afford a permanent record of the operations of the engines, it 

 is proposed, independent of the usual ship's log, to keep a steam journal ruled after the 

 annexed form, in which the force of the wind may be expressed by numbers, according 

 to a scale invented by Captain Beaufort, and intended for adoption in the navy, a copy of 

 which will be found attached to the directions for marking the steam journal. It is also 

 proposed, that the height of the wave above the trough of the sea may be estimated and 

 marked in yards, with occasional letters to express whether it be a long and easy, or a short 



