86 



PROCEEDINGS OF THE AMERICAN ACADEMY 



TABLE II. — Showing the Difference of Specific Gravity at 0° corresponding to 

 the Common Difference of about 30° between their Boiling-points, and to the Ele- 

 mentary Difference of CH 2 in the Series of Hydrides. 



TABLE III. — Showing the Difference of Specific Gravity at 0° corresponding 

 to the Common Difference of about 30° between their Boiling-points, and to the 

 Elementary Difference of CH 2 in the Series of Isohydrides. 



* Ronald's determination. 



