ATMOSPHERIC PRESSURE BETWEEN 104 C. AND 115 C. 425 



Abridged Tables for the Calorimctric Experiments. 



The following tables contain a summary of the observations. The original tables, 

 from which these have been abridged, are preserved in the archives with the reduced 

 tables referred to on p. 416. The second column gives the rise of temperature dd, 

 corrected to the absolute scale. The third column gives the flow in grammes per 

 second. In column four is each value of CE/Q dd as obtained from the experimental 

 observations, this quantity being expressed in joules per gr. deg. C. The next 

 column gives CE/QcZ# reduced to the standard temperature 104 '5 (J., and to a 

 barometric pressure of 760 mm. Column 6 gives the heat-loss expressed in joules per 

 gr. deg. C., i.e., II/Q, the quantity H being the sum of the terms h and &/Q. In the last 

 column are the experimentally determined values of the specific heat of steam under 

 atmospheric pressure at a temperature 104 '5 C. After the completion of the 

 experiments with the non-vacuum jacketed calorimeter it was thought advisable to 

 design a vacuum calorimeter in order to determine whether the magnitude of the k 

 term could be reduced. In consequence I designed the spiral calorimeter which was 

 used as soon as it arrived. After these experiments I designed the straight vacuum 

 jacketed flow-tubes which were exhausted by the makers. In experiments made with 

 these calorimeters the value of k was not so small as in the previoxis experiments with 

 the spiral calorimeter, and six more glass calorimeters were obtained which I hoped to 

 evacuate in situ. Unfortunately, each one cracked during the initial heating and no 

 experimental results were obtained until the silica calorimeter was set up. 



3 T, -2 



