184 Mr GRAHAM'S Account of the Formation of Alcoates. 



ing to 250, and pure chloride of calcium remains, which emits 

 nothing else upon being heated to redness. 



A quantity of this alcoate was dried, first by strong pressure 

 between many folds of linen, and then by pressure between folds 

 of blotting paper. The alcoate, carefully dried in this way, had 

 a white appearance much resembling bleached wax, and was soft, 

 but without tenacity. 



Ten grains were heated in a glass capsule, till the whole alco- 

 hol was driven off. There remained 4.1 grains chloride of cal- 

 cium. The atomic weight of chloride of calcium is 7, and that 

 of alcohol 2.875. In the alcoate, 4.1 grains chloride of calcium 

 were combined with 5.9 grains alcohol. 



4.1 : 5.9 : : 7 : 10.0731. 



In a second analysis, in which 20 grains of alcoate were em- 

 ployed, the result was precisely similar, as 8.2 grains chloride of 

 calcium remained, which is just double what was obtained in the 

 previous case from half the quantity of alcoate. If this alcoate 

 should be considered a compound of one equivalent proportion 

 of chloride of calcium, and three and a half proportions alcohol, 

 the alcohol would amount to 10.0625, which approaches very 

 nearly to the experimental results. But it would be better to 

 express the composition of the alcoate thus : 



Two atoms chloride of calcium, . . . 14. 

 Seven atoms alcohol, 20.125 



34.125 



In the solution of chloride of calcium, no crystallization takes 

 place at the temperature of 50, when the alcohol exceeds the 

 proportion of 10 parts to 4 parts of the dry salt. But the solu- 



