Water betiveen the Freezing and Boiling Points, &c. 241 



obviate it. Owing to the calorimeter which was used then, however, 

 having only a 2 mm.-bore flow tube, the effect was not so large as for 

 the tube with a 3 mm. bore. The value which corresponds to a tem- 

 perature of the water of 30 C. is 4- 1805 joules, which agrees to 1 part 

 in 2000 with the later and more accurate measurements which were 

 obtained for all the calorimeters with the various devices for elimi- 

 nating the stream-lines. 



Experiments between and 100. 



In this section the complete list of fifty-five tables is included, 

 giving upwards of forty-five complete experiments at different parts of 

 the range. The experiments have extended over just a year, and 

 divide themselves naturally into eight separate series. The results 

 with different calorimeters and with different rises of temperature are 

 included. Summarising the results and plotting the values of 8 for all 

 the experiments, the following values of 8 and the corresponding 

 values of J are obtained from the smoothed curve : 



Summary of the Specific Heat of Water from Smoothed Curve. 



Temperature. S. J. 



C. 



5 +0-00250 4-2105 



10 -0-00050 4-1979 



15 -0-00250 4-1895 



20 -0-00385 4-1838 



25 . -0-00474 4-1801 



30 - 0-00523 4-1780 



35 -0-00545 4-1773 



40 -0-00545 4-1773 



45 -0-00520 4-1782 



50 -0-00480 4-1798 



55 -0-00430 4-1819 



60 - 0-00370 4-1845 



65 -0-00310 4-1870 



70 -0-00245 4-1898 



75 -0-00180 4-1925 



80 -0-00114 4-1954 



85 -0-00043 4-1982 



90 +0-00025 4-2010 



95 +0-00090 4-2038 



Mean value 4-18876 



The values of 8 represent the specific heat of water in terms of a 

 thermal unit equal to 4-2000 joules, which occurs at 9 C. It is more 

 VOL. LXVII. T 



