312 



On the Rapid Production of Steam. 



FIFTH SERIES, 



With hollow cylinders of copper, presenting 149 square inches of 

 generating surface — water kept at 212^^. 



The mean amount of metal to the ounce of steam in the five ex- 

 periments marked comparable in the above table, is 10//^^ ounces, 

 which may be assumed as 1 1 without sensible error. 



SIXTH SERIES, 



To determine the quantity of steam yielded by given w^eights of cast 

 brass at red heat, when plunged iBto waterat 212'-'. 



Heat observed. 



Remarks. 



Ked only in 



the dark. 

 Co'/nparahle, 



(dull red.) 



Do. 



Do. 



Do. 



Do. 

 Clear red. 

 Full red. 

 Bright red. 



Immersed at once. 



Do. by degrees. 



Do. at once. 



Do. more gradually, 



Do. slovv^ly. 



Do. Do. 



Do. Do. 



Do. at once. 



Do. gradually. 



