OF ARTS AND SCIENX'ES. 



15 



Seco7id Series. — 120 measurements were made from January to 

 April, 1880, with the complete apparatus as described at p;iges 2 and 9. 

 The thermometers used were Casella 32378, Baudin 7335 up to 180°, 

 and Baudin 7789 above 200°. The first 20 measurements were 

 preliminary, being made with various tubes and forms of apparatus 

 before satisfactory forms were obtained. The remainder are given in 

 the following table. In all cases ^j = 0°, 



TABLE VI. — CO.,. Second Series. 



