I3(!f PHARMACEUTICAL P UEPAR ATIOjiS, 



Obfervatioiis on feverat Pharmaceutical Preparations, ly CiT^ 

 S.TEiNACHER, Druggiji at Paris. Abridged by Citizen 

 Parmentier*. 



Unguentum Nutritum. 



Ungucntum V^ITIZEN Dubree, an eminent drugglft at Rouen, has 

 nutntum. lately prefenled a formula for unguentum nutritum, to the 



Pharmaceutical Society. As apothecaries zealous for the per- 

 fedlion of their art, have propofed improvements in the pre- 

 paration of this ointment at different periods, I hive thought 

 that an obje6l to which the attention of pra6titioners has been 

 called from lime to time, notwithftanding it is apparently ob- 

 folete, deferved a frefli examination +. 

 •f he mixture of When oil, vinegar, and litharge are to be mixed together 

 ^''d rT^-'^* '"'■*^ ^ homogeneous mafs, a little Iftharge mu(t be diflblved in 

 Requires car- acetous acid X, and a fuftkient quantity of carbonic acid mufl: 

 bonx acid, j^g introduced, 1ft, to convert the greater part of the litharge 

 litharge inco '"^0 white carbonate, which remains ditfufed through the oil; 

 caibonare, 2dly, to thicken the oleous mixture, an effe6l analogous to the 



oil, thickening of foups by the carbonic acid, with which we were 



Too mucli vine- made acquainted by Pelletier, If a fufficient quantity of 

 veurthe^com- v'^^g^"^ ^^ form a faturated faline compound be employed, the 

 bination. mixture will never combine perfedly. This theory, founded 



•The formula of on experiment, brings us back to the prefcribed formula, as the 

 pharmacupaia ^'^^^ ^'^^^ ^^" ^^ adopted, that which produces an ointment, 

 the beft. the moft bulky, the lighteft, and the moft cooling to the part 



* Annala de Chimie, XLVII. 97. (No. 139.) 



\ Dr. Aikin, the learned editor of Lewis's Materia Medica, 



fays; "The unguentum nutritum, made without heat, though now 



expunged from our difpenfatories. Is much the beft of the ointments 



prepared from lead, and a very excellent application in many cafes. 



It thould not be long kept, but made frefti as wanted." H. 



L'tharge cim- J Experience has taught me, that levigated litharge is completely 



p!etei> foluble frji^^le jn a fufficient quantity of acetous acid, but that the final re-' 



but not in com' f'^uum of its folution in common vinegar, which has been fuppofed 



mon vinrgar. to be fuperoxided lead, contains only tartrite and malatof lead, with 



Tiie rcfuiuum 

 of the latter. 



a great deal of extraftive matter, which form apaftewith a remnant 

 of the litharge reduced toward the metallic ftate. 



afFeaed* 



