188 PROCEEDINGS OF THE AJMEEICAN ACADEMY. 



8. The temperature of the dekahydrate-tetrahydrate transition is 

 found to be approximately 19.987*^, on this scale. 



9. The temperature of the hexahydrate-tetrahydrate transition is 

 found to be approximately 25.90°, on this scale. 



10. All these points, especially the last, are to receive further 

 investigation at Harvard in the near future. 



