398 



REPORT — 1894, 



Boiler Tbials at Mulhouse. 

 Trials with Hirn's Calorimeter on the Quantity of Water entraiitsd in Steav,. 



Omitting Trial 23, the mean amount of water carried by the steam was 4-4 per cent. 



kind is called in America a barrel calorimeter. The barrel test is carried 

 out thus. An ordinary oil barrel is used, fitted with an outlet valve. A 

 set of tests are made following each other rapidly, and an average of the 

 results is taken. The barrel is filled and a trial made, the results of 

 which are discarded. The object seems to be to heat up portions of the 

 apparatus and the barrel itself. The barrel is then refilled, weighed, and 

 tlie temperature of the water taken. A steam pipe connected to the 

 boiler is then blown through to warm it, and a movable pipe is attached 

 leading to the barrel. The steam valve is then opened and the steam 



