Description of Edimrdsite. 165 



C. The acetic solution (B) was evaporated to dryness and water 

 affused whereby flocculi of silicic acid appeared in the solution, which 

 were separated by a double filter, washed, ignited and weighed 0.25 

 centigramme. 



D. The filtered solution (C) was treated with acetate of lead so 

 long as any precipitate went down. The precipitate was separated, 

 washed, and heated to redness.- It weighed 68 centigrammes, which 

 consisting of the subsesquiphosphate of lead, is equivalent to 12 cen- 

 tigrammes of phosphoric acid. 



E. The undissolved matter from the alkaline solution B, which 

 had a yellowish white color, was digested in hydrochloric acid for 

 several hours, during which chlorine was emitted and the matter 

 which was not taken up changed from yellow to reddish brown. 

 The solution was withdrawn from the undissolved portion and pre- 

 cipitated by potassa with ebullition. The precipitate had a bluish 

 gray color. When washed and ignited, it weighed 15 centigrammes, 

 and had a chestnut brown color. 



F. The alkaline solution (E) was rendered slightly acid by means 

 of hydrochloric acid, after which ammonia was added ; a white 

 flocculent precipitate appeared. It was separated from the solution 

 by the filter, and after washing was treated with hydrochloric acid, 

 whereby about two thirds of its bulk were dissolved ; the remainder 

 was silicic acid. The solution was transferred to a flask and digested 

 for several hours, with excess of carbonate of ammonia, in a mild 

 temperature. That portion of the precipitate which was not taken 

 up by the ammoniacal solution, vs^as separated, washed, and estima- 

 ted by means of the double filter at 2 centigrammes. 



G. The ammoniacal solution from which the alumina was separa- 

 ted (E) being boiled for a few minutes, became milky ; but after 

 being evaporated to dryness and ignited in a platinum capsule, the 

 residuum of glucina was too small to be appreciated by the balance. 



H. The solution from which the alumina and glucina had been 

 precipitated by ammonia (F) was tested for lime by the addition of 

 oxalate of ammonia. No cloudiness was occasioned by the oxalate. 

 After some hours standing, the solution was treated with phosphate 

 of soda, whereby its transparency was slightly affected. 



I. The 15 centigrammes of a chestnut brown powder (E) were 

 digested for some time in hydrochloric acid and finally treated with 

 sulphuric acid. The matter remaining undissolved was separated, 

 washed, and ignited. It weighed 3.5 centigrammes and had the 



