AND WINDING DKUM. 



in the case where both are worked by steam. By taking 

 the figures corresponding to the conditions we indicated for 

 drums worked by horse power, we obtain the following 

 results, limiting the duration of work to 200 or 210 days 

 per year : 



We assume in this ca-e the engine to be solely used for this work, and bearing all the 

 cost of writing off. 



