126 PROCEEDINGS OF THE AMERICAN ACADEMY 



218.6 -j- .2 = 218.8 = 17°.994 251.6 — 1 = 251.5 = 17°.962 



Correction for stem — .006 Correction for stem — .006 



17°.988 17°.956 



Mean temperature of mixture, 17°. 972. 



Mean specific heat — 18° _ 1691.2 X 8°.644 _ 002 _ 

 Mean specific heat 18° — 27° — 811.4 X 17°.972 ~~ 



June 14. — Second Experiment. 



Calorimeter before 2016.3; temperature 361.4 by No. 6163. 

 " after 3047.0 ; " 244.5 and 288.7. 



Air, 21° C; jacket about 27°. 



361.4 -f .2 == 361.6 = 33°.803, or 33°.863 when corrected for stem. 



244.5 -j- .2 = 244.7 = 20°.865 ; no correction for stem. 

 288.7 — .1 = 288.6 = 20°.846 ; " " 



Mean, 20°.855. 



Mean specific heat between and 21° _ nn „ n 



• = l.OObz. 



Mean specific heat between 21 and 34 



June 14. — Third Experiment. 



Calorimeter before 1961.8; temperature 293.6 by No. 6166. 

 " after 3044.6; " 243.7 and 213.0. 



Air and jacket, about 18° C. 



393.6 — .1 = 393.5 = 29°.036, or 29°.077 when corrected for stem. 



243.7 — .1 = 243.6 = 17°.349 ; no correction for stem. 

 213.0 + .2 = 213.2 = 17°.374 ; " " 



Mean, 17°.361. 



Mean specific heat between and 17° _ . oo^a 

 Mean specific heat between 17° and 29° 



It is to be observed that thermometer No. 6166 in all cases gave 

 temperatures about 0°.02 or 0°.03 below No. 6163. This difference 

 is undoubtedly in the determination of the zero points, as on June 15 

 the zero points were found to be 20.4 and 58.0. As one has gone up 

 and the other down, the mean of the temperatures needs no cor- 

 rection. 



