322 
PROFESSOR 0. REYIS^OLDS AND MR. W. H. MOOREY 
The engines mid brakes were occupied two or three times a wmek in the ordinary 
work of the laboratory, so that there were only one or two days a week available for 
these experiments, and every opportunity was valuable. 
The Design of the Condenser. 
18. At the same time he made experiments to determine the necessary length of 
jiipe in order that the water flowing along’ it at the rate of 20 lbs. a minute wmuld be 
cooled from 212° to 70°, when the pipe was jacketed by a stream of town’s water at 
50° Fahr. ; by the result of wdiich experiments the condenser in lYhich the effluent 
water is cooled to 75° was designed (Plates 4 to 7). 
Design oj the Ice-Cooler. 
19. To cool the water to 32°, or as near as practicable, I had, on account of the 
danger of some ice being carried through with the water if the ice were once put 
into the wmter, decided to pass the water through a long coil of ordinary water 
piping, immersed in water, towards the top of a tank wdth ice under the coil, 
Fig. 7. 
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and from experiments made by Mr. Moorby, I decided on the coil and arrangements 
shown. The coil consists of |-inch composition pipe, 200 feet long, the tank being 
2 feet 6 inches wide and deep and 4 feet long, the coil being placed near the 
surface of the water on a shelf wflth a wire netted space at the end for the introduc¬ 
tion of the ice, which is pushed down under the shelf, and with a paddle which is 
kept in continual motion by a cord from the line shaft, thus securing a rapid 
circulation of the water. The tank is constructed of 1 -inch pine saturated with 
jrarafiin wax, in preference to a metal tank. 
