MtLD MEE0UEOU8 OHLOBIDE 209 



talline masses ; odorless, and having an acrid and persistent 

 metallic taste ; permanent in the air ; soluble in 16 parts of 

 water and in 3 parts of alcohol. 



Incompatihles. — It is incompatible with most substances. 



Dose.— H. & C, gr.v.-vii. (.3-.5); Sh. & Sw., gr.ii. (.12); 

 r>-.gr.^-i(-002-.008). 



Hydeabgyei Chloridum Mite. Mild Mercurous Chloride, 



Hg,Cl, (U.S. P.) 



( Calomel, Mild Chloride of Ilercury.) 



Synonym. — Hydrargyri subchloridutn, B. P.; hydrargy- 

 rum chloratum mite, P. G.; hydrargyri chioridum, hydrar- 

 gyrum chloratum (muriaticum) dulce, mercurius dulcis, 

 calomelas chloruretum (chloretum) hydrargyrosum, sub- 

 chloride (protochloride) of mercury, E.; protochlorure (sous- 

 muriate) de mercure, calomele, Fr.; quecksilberchloriir, 

 calomel, G. 



Derivation. — Heat mercurous sulphate and sodium 

 chloride. Calomel sublimes. Hgj SO^ + 2 Na CI = Hg, 

 01, + Na, SO,. 



Properties. — A white, impalpable powder ; odorless and 

 tasteless ; permanent in the air ; insoluble in water or 

 alcohol. When strongly heated it is wholly volatilized 

 without melting. 



Dose.—B.., 3 ss.-i. (2.-4); C, 3 v.-vi. (20.-24); D., gr.ss. 

 (.03), in divided doses; D., gr.iii.-v. (.2-.3) in single doses. 



PREPARATION. 



pilules Cathartiooe Compositce. Compound. Cathartic Pills. (1J. S. P.) 

 Compound extract of colocynth, 80; calomel, 60; extract of jalap, 

 30; gamboge, 15; water, Q. S. to make 1,000 pills. 

 Dose.— D., pill 1 to 3. 



HlDEAEGYEi loDlDUM EuBEUM. Eed Mercuric Iodide. Hgl,. 

 (U. S. & B. P.) 

 {Binodide of Mercury, Eed Iodide of Mercury.) 

 Synonym. — 'Sjdra.rgyrvim. biiodatum rubrum, P. G.; 



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