Intelligence mid Miscellaneous Articles. 321 



perfectly washed, were mixed and allowed to react for twenty-four 

 hours, the temperature varying from 68° to 77° Fahr.; there was 

 produced 0*6 of a part of corrosive sublimate. 



Similar experiments were made with calomel prepared by preci- 

 pitation, with precisely similar results. 



Experiment II. — 1000 parts of the assay liquor* had 60 parts of 

 calomel (tl la vapeur) digested in it for 24 hours, at a temperature 

 varying from 104° to 128° Fahr.; 1*5 part of corrosive sublimate 

 was produced. 



The preceding experiments repeated with precipitated calomel 

 (precipite blanc), yielded a mean of 1*7 part of corrosive sublimate. 

 This chemical result confirms the opinion of therapeutists, who have 

 always considered the calomel obtained by precipitation as sensibly 

 more active than that prepared in the dry way. 



The following question was then examined : Is the quantity of 

 sublimate produced proportional to that of the calomel employed, or 

 to that of the alkaline chloride ? 



1st Experiment. — Assay liquor 1000 parts, calomel 10 parts ; after 

 reacting for twenty-four hours, between 104° and 112° Fahr., 1*4 

 part of sublimate was produced. 



2nd Experiment. — Assay liquor 1000 parts, calomel 20 parts ; 

 sublimate produced 1*5 part. 



3rd Experiment. — Assay liquor 1000 parts, calomel 40 parts ; 

 sublimate formed 1*5 part. 



4th Experiment. — Assay liquor 1000 parts, calomel 60 parts , 

 sublimate produced 1*5 part. 



The preceding experiments repeated with calomel obtained by 

 precipitation, gave 



1st Experiment. — Assay liquor 1000 parts, calomel 10 parts ; 

 sublimate produced 1 *4 part. 



2nd Experiment. — Assay liquor.. 1000 parts, calomel 20 parts ; 

 sublimate produced 1*4 part. 



3rd Experiment. — Assay liquor 1000 parts, calomel 40 parts ; 

 sublimate produced 1*5 part. 



4th Experiment. — Assay liquor 1000 parts, calomel 60 parts ; 

 sublimate produced 1*7 part. 



All these experiments show that the quantity of sublimate pro- 

 duced is not at all proportional to that of the calomel employed. 



The experiments about to be related, prove beyond all doubt, 

 that the quantity of sublimate formed is always in proportion to 

 that of the alkaline chloride. 



1st Experiment. — After twenty-four hours' contact, between the 

 temperature of 104° and 122° Fahr., distilled water 1000 parts, 

 calomel 20 parts, common salt and sal-ammoniac each 60 parts ; 

 sublimate produced 1*6 part. 



2nd Experiment. — Calomel 240 parts, commomsalt and sal-am- 

 moniac each 10 parts ; sublimate produced 0*5 part. 



* To avoid repetition, the author calls the solution of alkaline, just de- 

 scribed, the assay liquor. 



Phil. Mag. S. 3. Vol. 21. No. 138. Oct. 1842. Y 



