With the construction of this apparatus it was found impracticable to employ the type of alcohol lamp formerly used with success in the Wesleyan University respiration chamber. Inability to illuminate the gage on the side of the lamp and the small windows on the side of the calorimeter precluded its use. It was necessary to resort to the use of an ordinary kerosene lamp with a large glass font and an Argand burner. Of the many check-tests made we quote one of December 31, 1908, made with the bed calorimeter: Several preliminary weights of the rates of burning were made before the lamp was introduced into the chamber. The lamp was then put in place and the ventilation started without sealing the cover. The lamp burned for about one hour and a quarter and was then weighed again. Then the window was sealed in and the experiment started as soon as possible. At the end of the experiment the window was taken out immediately and the lamp blown out and then weighed. The amount burned between the time of weighing the alcohol and the beginning of the experiment was calculated from the rate of burning before the experiment and this amount subtracted from the total burned from the time that the lamp was weighed before being sealed in until the end, when it was weighed the second time. For the minute which elapsed between the end of the experiment and the last weighing, the rate for the length of the experiment itself was used. During the experiment there were burned 142.7 grams of 92.20 per cent alcohol of a specific gravity of 0.8163. A tabular summary of results is given below: +----------------------+--------+-----------+ | | Found. | Required. | +----------------------+--------+-----------+ | Carbon dioxide gms. | 259.9 | 251.4 | | Oxygen " | 278.5 | 274.8 | | Water-vapor " | 165.8 | 165.6 | | Heat cals. | 829.0 | 834.5 | +----------------------+--------+-----------+ Thus does the apparatus prove accurate for the determination of all four factors. BALANCE FOR WEIGHING SUBJECT.