found to have lost four grams ' and a quarter. The solu- 

 tion was of a yellowish green colour, lost all alkaline taste» 

 and precipitated, as before, with either the acetous or 

 muriatic acid. 



EXPERIMENT IX. 



I/' I- ■ , . 



c" 



A fragment of calculus, of the same tind, weighing 

 eighty-one grains, Was suspended, as before, for forty-eight 

 hours, in a mixture," consisting only of fifteen drops of 

 the same alkali, to four ounces of distilled water, which 

 scarcely imparted an alkaline taste. After being taken out 

 and dried, it was found to have lost one grain and three 

 ({uarters; the specimen consisting chiefly of the external 

 lamina?, much more slowly acted upon. 



EXPERIMENT X. 



This same fragment, washed and dried, was again im- 

 mersed, for forty-eight hours, in a similar lixivium, and 

 under the like circumstances. The loss noAv amounted to 

 nearly four grains; and, from this we learn, how con- 

 siderably the energy of the menstruum is increased, by 

 each succeeding immersion; so much so, indeed, that a 

 few repetitions enable it to disunite the laminas, and cause 

 them to crumble into a pulverulent state, easily voidable 

 with the urine. To the happy result, therefore, of this ex- 

 periment, let riie earnestly solicit the attention of our young 

 practitioners. 



EXPERIMENT 



