360 
PROFESSOR 0. REYNOLDS AND MR. W. H. MOORBY 
the glass tube. The stopper and cap were both penetrated bj a short length of 
^g-inch diameter brass tube, which carried a gas cock at its upper end. The thermo¬ 
meter was hung by a piece of string from the lower end of the -^-inch pipe—the 
graduated part of the stem being all clearly visible through the glass walls of 
the chamber while the bulb was well in the main stream of water flowing through 
the brass T. 
Fio-. 
o 
Fig. 4. 
Fro/7/jbrdAe 
% 
Cold vater tbermometer jacket. 
Hot water tliermomeler jacket. 
A small stream of water was allowed to run to waste through the small gas cock 
O O 
at the top, thus ensuring the whole of the stem of the thermometer being kept 
at the proper temperature. 
