408 



ME. J. H. BKINKWOKTH ON THE SPECIFIC HEAT OP STEAM AT 



to the horizontal, consequently, any water condensed between the double walls 

 gravitates towards the drain-tube, d 2 , whence it is expelled. The other drain-tubes, 

 d l and d s , serve to remove condensed steam from other parts of the apparatus. 



The drains d 1 and d 2 consisted of lengths of about 2 metres of small-bore compo- 

 tubing. The drain d A consisted of tubing of the same bore, but the lengths fixed 



(a) 



(b) 



Fig. 8. 



/ 



here were altered according to the magnitude of the steam-flow in such a manner 



that there was always a small steady current of steam passing out from this drain. 



e dram-tube, d 3 , was connected to a brass tube, 3 mm. diameter, carried by the split 



ffk to which reference has been made, the end of the brass tube being flush with 





