Manchester Memoirs, Vol. xlii. (1898), No. 0. 17 



(7) A pressure-gauge (or barometer) by which the 

 standard pressure for the boiling point might be readily 

 determined at 3*^ or 4° above or 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 diffe- 

 rences of temperature and quantity of water in the brake, 

 which would be relatively six times larger, with a rise of 

 180^ than with 30^. 



Having convinced himself by preliminary designs, 

 not only of the practicability of the appliances, but 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 for the determination of the requisite pro- 

 portions of the appliances, and these preliminary inves- 

 tigations were not commenced till the summer of 1894, 

 when Mr. Moorby undertook to carry on the research. 



A convenient table weighing machine, with a tank to 

 hold I ton of water, was obtained and placed on the other 

 side of the passage, opposite the brake. 



The outflow pipe was rearranged, a flexible tube being 

 used to take the water from the brake to a fixed thermo- 

 meter chamber. Glass thermometer chambers were 

 constructed, so that both the thermometers were wholly 

 immersed in the flowing water. 



The effluent water was led from the thermometer 

 chamber over the passage to the switch into the tank. 



The switch was constructed so that it would divert 

 the water from waste to the tank, or vice versd, without 

 any splash, and was subsequently connected with the 

 counter, so that they both moved together {Fig. 6). 



When these arrangements were completed, a series of 

 experiments was commenced by Mr. Moorby, similar to 



