58 G. A. Iiebig—Specifie Heat of Water. 
and the eae, was held in place by three vulcanite strips 
to prevent conduction to the jacket. Although when experi- 
menting at low temperatures the vessel B was useless, still it 
was often kept in place and the water from the melting ice 
allowed to flow through it before entering the calorimeter. In 
no case did the temperature of the water from the ice, when in 
the vessel B, differ appreciably from zero. The opening into 
the stop- -cock was always covered with fine wire gauze to pre- 
-vent Lay nae of ice from being carried into the calorimeter 
wi he flowing water. The calorimeter was made of very thin 
siaetey and lightly plated with nickel; three orifices on the top 
permitted the sr pe of the vulcanite spout and the two 
thermometers. The weight of the calorimeter was 888°5 grams 
and its calorific ca eis 35-4 grams. During the course of-the 
investigation, the stirrer H having been broken n, it was neces- 
sary, in order to repair it, to unsolder and afterwards resolder 
the top of the calorimeter. In this way the weight of the 
calorimeter increased four grams. Bat as the increase was due 
entirely to solder, nothing elie having been removed or added, 
the new capacity was readily determined. Thus, assuming sol- 
der to be composed of equal parts of tin and lead, its specific 
heat between 0° and 40° w ould be about °048, therefor re 
“043 X 4 == 172 
or ‘2 must be added to ar ne value of the capacity, mak- 
ing 35°6 and the weight 392° grams. 
The method of =r pesiaonces was as follows: the vessel A 
having been filled with broken ice, the thermometers were im- 
mersed therein and after about ten or twelve minutes their zero 
