OF ARTS AND SCIENCES. 127 



June 15. 



Calorimeter before 2068.2 ; temperature 364.6 by No. G1G6. 

 after 2929.2; " 249.7 and 217.7. 



Air and jacket at about 22° C. 



264.6 = 26°.766, or 26°.782 wben corrected for stem. 



249.7 = 17°.822, or 17°.812 " " 



217.7 -f .1 = 217.8 = 17°.884, or 17°.874 when corrected for stem. 



' Rejected on account of great difference in final temperatures by the 

 two thermometers, which was probably due to some error in reading. 



June 21. 



Calorimeter before 2002.7 ; temperature 330.3 by No. 6163. 

 " after 3075.2; " 221.9 and 256.6. 



Air and jacket, 21° C. 



330.3 -f .1 = 330.4 = 30°.321, or 30°.359 when corrected for stem. 

 221.9 + .1 = 222.0 = 18°.349, or 18°.343 " " 



256.6-}- -0 = 256.6 = 18°.358, or 18°.352 " " 



Mean, 18°.347. 



Specific heat between and 18° _ 1 nnr7 

 Specific heat between 18° and 30° 



June 21. 



Calorimeter before 2073.8; temperature 347.8 by No. 6166. 

 " after 2986.8 ; " 234.5 and 206.6. 



Air and jacket, about 21° C. 



347.8 + .0 = 347.8 = 25°.457, or 25°.471 when corrected for stem. 

 234.5 + -0 = 234.5 = 16°.643, or 16°. 636 " " 



206.6 -j-.l = 206.7 = 16°.651, or 16°.644 " « 



Mean, 16°.640. 



Specific heat between and 17° 

 Specific heat between 17° and 25° ~ 



Rejected because dew was formed on the calorimeter. 



A series was now tried with both thermometers in the calorimeter 

 from the beginning:. 



