320 
PROFESSOR 0. REYNOLDS AND MR. W. H. MOORBY 
boiling point might be readily determined at 3° or 4° Fahr. above and 
below the boiling point, so as to admit of the ready and frequent 
correction of the thermometers used for identifying the temperature of 
the effluent water. 
(8.) Some means of determining the terminal differences of temperature and 
quantity of water in the brake, which would be relativel}^ six times 
larger with a rise of 180° than with 30°. 
The Si^ecial A 2 ypliances and Preliminaries of the Research. 
12. Having convinced myself by preliminary designs, not only of the practicability 
of the appliances, bnt also of the possibility of their inclusion in the already much 
occupied space adjacent to the brake, there still remained much to be done in the 
way of experimental investigation to obtain data from which the requisite proportions 
of these appliances conld be determined, and these preliminary investigations were 
not commenced till the summer of 1894, when Mr. MooPvBY undertook to devote 
himself to the research. 
Weighing Machine and Tanh. 
13. The first step consisted in obtaining a somewhat special table weighing 
machine (Plates 4 to 6), having two rider weights on independent scales, one 
divided to 100 lbs. from 0 to 2200, the other to 1 lb. from 0 to 100. Also 
a galvanized iron tank, 5' X 2'9" X 2'9", capable of holding above one ton 
of water, with a 4-inch screw valve at the bottom, opening inwards b}^ a handle 
above the top of the tank, the top of the tank being covered with carefully fitted, 
but separate, |-inch pine boards, previously steeped in melted paraffln-wax, to 
prevent adhesion or absorption of water. This machine and tank, which is a large 
affair, was placed in the only position available, opposite the end of the shaft and 
behind the standing pipes for supplying the condensing water to the engine, thus 
leaving the passage between these pipes and the end of the shaft open, an important 
matter, as this passage was the only place from which the observations on the 
brakes could be made. This entailed the carrying the outflow from the brake over 
the passage, about 6 feet 6 inches from the floor. 
Design of the Outflow. 
14. This extension of the pipe further entailed the necessity of making this pipe 
a fixture, and connecting it with the outlet below the automatic cock by a hent wire- 
bound flexible indiarubber pipe, so as to prevent any moment on the brake. (See 
fig. 6.) 
