70 On the Decompositioii of Alkaline Sidphurets 



subjoined lotion ; and I am happy to announce to the pub- 

 lic, that by bathing the aft'ected head tiierewith a few times, 

 morning and evening, and suffering the parts to dry with- 

 out interruption, the sca!)S will decorticate and peel off 

 from the scalp, and leave the parts underneath perfectly 

 healed ; and this without torturing the patient by either 

 shaving- the head or cutting off the hair. I have been \\\ 

 the habit of treating this disease in this manner, and with 

 this application, for the last ten years, and have mvaria- 

 bly found it to answer (when duly applied) both in chil- 

 dren and adults; and in many inveterate cases even where 

 every other means had been previously used without effect, 

 some of which were of several years standing. 

 li. Kali sulphurat. (recens preparat.) jiij. 



Sapo. alb. Hispan. 5Jss. 



Aq. calcis j vijss. 



Spir. vinos, rect. 5ij. 

 Ft. Lotio pro tinea capitis. 

 Might not the above remedv for tinea capitis be effica- 

 cious in relieving that dreadful endeuuc disease called Iri- 

 ckoma, or plica polnnica P 



XIV. On the Decomprmtion of Mkaline Sidphurets hi/ the 

 Oxides of Lead and of Manganese. By M. Dize*. 



If charcoal be mixed with an alkaline sulphate, and then 

 exposed to a high temperature, the oxygen, one of the 

 constituent parts of the acid, burns the charcoal, quitting 

 the sulphur which served as its radical ; with which the 

 alkali then combines, forming what is called an alkaline 

 sulphuret. This combination, which is a result of the de- 

 composition of the alkaline sulphates by the charcoal, is not 

 so easily destroyed as might be supposed, especially when 

 large masses are operated upon. The exposure, frequently 

 repeated, of the alkaline sulphurets to a managed heat, i$ 

 not sufficient to cause the sulphur to volatilize; for the 

 alkali still retains enough of it to render it improper for cer- 

 tain operations in the arts; and the sulphur during its vo- 

 latilization is prrtlv deflagrated, and forms sulphurous acid, 

 which combines with the alkali. Tlius the operation is 

 rendered more complex instead of being simpiitied, since 

 we obtain only an alkali mixed with sulphuret and alkaline 

 sulphite. 



• From Fan Mo: s's JoWi'ul, No. 15. 



The 



