Accuracy of the cutler-hammer recording gas calorimeter when used with gases of high heating value

The accuracy of. the. Cutler-Hammer r e co~'di n g gas calorimeter, when used with gases or h~gh heat ~n g value, IS dlscuss~d. The st udy mcludes the preparation of a standard gas of high heatu;g value, a comparIso n <; > f hydrogen and m etha ne as calibrati ng gases, the efl'ect upon the mstrum e n ~ of changes m room and tank-wate r temperature, the in strum ent's accur acy when burl1lng propan e, the eff ects of bleeder burner height and the effects of differen ces ini~let gaspressure. It is concluded t hat .an acc u.r:1cy of .0.25 'pe rce ~t, or even better, can be obtall1ed wILh the Cutler-H ammer calonmeter If certam precautlOns a re carefull v followed .