52 Dr. Kane on the Compounds of Ammonia. 



Which agree with the results of the theoretical formulae given for the oxychloride 

 last examined. When the ammonia employed is not sufficient to precipitate all 

 the zinc, the oxychloride formed is differently constituted from that just 

 described, and is the same with that described by Schindler, and which is analo- 

 gous to the ordinary oxychloride of copper. Schindler, however, appears to have 

 dried the specimens which he analyzed at 212°, for I have found this oxychloride 

 to retain four equivalents of water at 100° F. Its formula is then 



zncl \- 3 zno -{- 4 ho. 



As the same result, except in the estimate of the water, had been obtained by 

 Schindler, I will not enter into any details of my verifications of his results. I 

 have, however, obtained another oxychloride, which, in a less hydrated condition, 

 had been noticed by Schindler likewise. I prepared it by adding to a solution 

 of chloride of zinc, caustic potash liquor, until it began to react alkaline. The 

 process by which Schindler had obtained it, almost necessarily produced the 

 separation of the water it should contain ; thus he evaporated chloride of zinc 

 until it had lost a certain proportion of muriatic acid, and then diluted with much 

 water the remaining sirupy liquor. The formula which he obtained was 



zncl -{- 9 zrao -j- 3 ho. 



This oxychloride, as formed in my experiments, scarcely differs from those 

 already described, in its external appearance ; when heated it yields water in the 

 same manner. The analysis of it merely, therefore, need be given in detail. 



A. 1.790 grammes, dried over the spirit-lamp, gave 1.384 of residue, or 

 77.32 per cent. 



B. 2.131, treated in the same manner, gave 1.G46, or 77.24 per cent. 



C. The 1.384 of residue, exposed to the air, gradually absorbed water, and 

 became 1.485; therefoi'e the quantity of water absorbed was to the original 

 quantity as 101 to 406, or nearly as one to four. 



D. 3.030 of dried oxychloride were dissolved in dilute nitric acid, and pre- 

 cipitated by nitrate of silver ; the chloride produced weighed 0.938 grammes, or 

 30.96 per cent., equivalent to 23.93 per cent, for the hydrated oxychloride, 

 which contains 5.921 of chlorine. 



Hence is derived the formula zncl-{-Qzno-\- 14ho, by which there should 

 be 



