.i| MESSRS. A. SMITIIELLS. II. M. DAWSON, AND II. A. WILSON: ELECTRICAL 



glass cylinder, and in this most of the coarse spray was deposited, running taick into 

 the reservoir of solution. 



The solution in the reservoir, R, was always adjusted to a constant level, which \\;is 

 about 1 centiin. below the nozzle of the sprayer. 



The air supply from the iron drum, D (fig. 1), was passed through a flask, F, half 



Fig. 3. 



01 



if, 

 S 



full of water, which, being gently warmed, served to saturate the air with moisture. 

 Any excess of moisture was condensed in the long tube and in two empty bottles, B. 

 A water m.-uiometer, W, was connected to a branch between these bottles, and the 

 air supply regulated so that this indicated 118'5 centims., the variations not exceeding 

 1 or 2 millims. 



The gas pressure was measured by a multiplying differential manometer, L, contain- 



