.1821.] ,M, Brandes on Atropium, 269 



sulphate of atropium appears to contain three times as much 

 oxygen in the acid as in the base ; and as 36-52 sulphuric 



21*865 



acid contain 21-865 oxygen, — - — = 7-289 will indicate the 



oxygen in 38*93 of atropium. 



The muriates contain, according to Berzelius, in their acid, 

 twice the oxygen which exists in the base, and 25*4 muriatic 



acid containing, according to Berzelius, 14-825 oxygen — - — 



= 7*412 will indicate the oxygen in 39*19 of atropium. 



By comparing these two results, it will be found that they 

 differ very Uttle. I am, however, inclined to suppose the result 

 of the analysis of the sulphate of atropium to be the most cor- 

 rect, and then 100 parts of atropium would contain 18-9"1 oxy- 

 gen, a quantity far exceeding the oxygen found in any one of the 

 similar alkalies. 



There are, however, strong reasons for believing that the 

 different salts which have been analyzed are bisulphates and 

 bimuriates, and then the oxygen of the atropium would only 

 amount to one half of the above-mentioned quantity. The salt 

 which is above described as a bisulphate then would be a qua- 

 drisulphate. The oxygen in 38-93 atropium would then be 

 3*644, and 100 parts of atropium would contain 9*4 of oxygen. 



The oxygen in the different parts of sulphate of atropium 

 would be : ^ 



Oxygen. 



Atropium 38-93 3-644 



Sulphuric acid 36-52 21-865 



Water 24-55 21-654 



The oxygen in the acid and in the water, therefore, are equal, 

 and six times that of the atropium. 



According to Berzelius's theory, the oxygen in the muriate of 

 atropium would be : 



Oxygen. 



Atropium , 39-19 3-706 



Muriatic acid 25-40 14-808 



Water 35*41 31*784 



The quantity of oxygen in the acid is four times as much as 

 that in the atropium, and that of the water twice as much as 

 that of the acid. 



One hundred parts of dry sulphate of atropium contain 



Atropium 51*59 



Sulphuric acid 48-41 



100*00 

 Or it consists of 



