ON THE I.IME IN CREAM OP TARTAR. 31' 



tried, we proceeded in the following manner. A thousand 1000 grs. 

 grains of each parcel, heated alternately hi a platina cruci- 

 ble, to dry them without producing* any other alteration, 

 lost e mally eighteen grains. The heat being increased, till 

 the complete extrication of the vapours, that announced the 

 decomposition of the tartarous acid, was accomplished, a 

 bulky coal remained, of the weight of four hundred and * eft 43 of coat-, 

 twenty-six or four hundred and thirty grains. 



Each coally residuum was diffused in eight ounces of dis- Dissolved in di, 

 .... • - • <i •• • i #• i • 1 l-i jute muriatic 



tilled water, saturated with muriatic acid, or which a slight aci j arK j j )rCT 



excess was added, and then filtered. Into each of the li- cipitatcd by 

 ... i, ,. . . , . carbonate of 



quors, containing the muriates ot lime and potash, a solu- SO( j a 



tion of carbonate of soda was poured gradually, till no pre- 

 cipitate was formed by it. 



The precipitates, being collected on dried filters of a Precipitated 



known weight, were washed, and afterward exposed for twelve .°. ar °i mc °J! 

 o ■ lime trom oZ 



liours in a stove kept at a temperature of 40° or 45° II. [from to 42 grs, 

 123° to 133° F.]. They were then carbonate of lime in the 

 following proportions. 



The weight of these carbonates of lime being known, it 

 remained for us, in order to attain a complete solution of the 

 question, to reduce them to pure lime, and to learn after- 

 ward in what proportion this same lime entered into the cal- 

 careous tartrite to form its basis. With this view we pro- 

 ceeded as follows. 



1. A hundred grains of our calcareous carbonates strongly Carbonate of 

 calcined left fifty-four of lime in a caustic state, mixed with ,ime contain* 

 a little oxide of iron in too small a proportion to be calcu- 

 lated. 



2. A hundred grains of tartrite of lime, heated very Tartrite of lime 

 strongly in the same manner, gave thirty-five grains of a contains " S5 « 

 residuum, that did not effervesce, and was found to be pure 



lime. 



The first of these two experiments demonstrates, that 

 lime constitutes fifty- four hundredth parts of calcareous car- 

 bonate. The second, that the base of tartrite of lime formi 



thirty- 



