SCIENTIFIC HEWS. 1J9 



but he has found, when the experiment completely fucceeds, 

 that palladium, containing one third of mercury, is of the 

 fpecific gravity of 11.5,— when it contains one fourth of that 

 metal, the fpecific gravity is one part higher ; and the higher 

 the fpecific gravity, the greater is the proportion of platma, 

 and the lefs the ductility of the compound. Above 12.5, it 

 fo far ceafes to have the properties of palladium, that it is no 

 longer foluble in nitric acid. 



The remaining particulars of this highly interefting paper 

 we muft defer till after its publication by the Royal Society. 



A new Method of Painting, propqfed by M. Carbonell, a 

 Spanijh Phyfician, capable of being advantageoujly fubftituted 

 for Painting in Diftemper *. 



THE difagreeable fmell perceived on entering rooms newly Bad fmell of 

 painted in 7 diftemper is univerfally known. It is only after Pj£"J£« in dIf - 

 having left thefe rooms expofed to the action of the air, that 

 they are habitable. A procefs which remedies thefe two in- 

 conveniences, deferves therefore to be adopted, and it is with 

 that view that we infert that lately publilhed by M . Carbonell* 

 a Spanifh phyfician. 



The mode of operation, defcribed by the author, is very Simple procefs 

 fimple, it confifts in fubftituting the ferum of the blood of f erum °f blood 

 oxen, inftead of the folution of glue commonly ufed to mix up infteadof fizej 

 the colouring matter. 



To fucceed, the following methods mufl be ufed : 



lft. The butcher muft be directed to receive the blood of 

 one or more oxen in proper veflels. When the blood is quite 

 cold, that is to fay three or four hours after it is drawn, the 

 veflels muft be gently inclined, by which means, a clear, am- 

 ber-coloured liquor will be decanted. This muft be pafled 

 through a ftrainer to feparate the fragments of the clot which 

 have broken off and been mixed with it. 



2d. Reduce to powder quick-lime, which has been fprinkled with flaked 

 with a little water to diminilh the adhefion of its integrant 

 parts. Pafs this powder through a fieve, and depofit it im- 

 mediately in boxes or bottles well clofed. 



* Bibliotheque de Sonini, No. V. 



3d. When 



