specific Gravities indicated by BaUM^s Hydrometer. 30 



M. Baume, in his Elemens de Pharmacie *, from which the whole of this account is 

 deduced, has given a table (p. 410.) of the degrees of his Hydrometer, indicated by different 

 mixtures of ardent fpirit and pure water -, where, he fays, the fpirit made ufe of gave thirty- 

 feven degrees at the freezing point of water ; and in a column of the table he ftates the 

 bulk of this fpirit, compared with that of an equal weight of water, as 35-! to 30. The laft 

 proportion anfwers to a fpecific gravity of 0.842, very nearly. A mixture of two parts, 

 Dy weight, of this fpirit, with thirty of pure water gave twelve degrees of the Hydrometer 

 at the freezing point. This mixture, therefore, contained 6^ parts of Blagden's ftandiird 

 to 100 water, and, by Gilpin's moft excellent tables f, its fpecific gravity mufl have been 

 C.9915-. By the fame tables, thefe fpecific gravities of 0.842 and 0.99 r5 would, at 10° Reau- 

 mur, or 550 Fahrenheit, have fallen to 0.832 and 0.9905. Here then are two fpecific gra- 

 vities of fpirit correfponding with the degrees 12 and 37, whence the following table is con- 

 ftruded. 



BaVME's Hydrometer fir Spirits. 



Temperature 55° Fahrenheit, or 10° Reaumur. 



Degree! 



10 

 II 

 12 



'3- 

 14. 



15 



16 



17 

 18 



19 



23 



25 



Sp. Gravity. 

 .892 



.886 

 - .880 

 .874 

 .867 

 .871 

 .856 

 .852 

 .847 

 .842 



•837 

 .832 

 .S27 

 .822 

 .8.7 



With regard to the Hydrometer for falls, the learned author of the firft part of the En- 

 cyclopedic %, M. de Morveau, who by no means confiders this an accurate inftrument J, 

 affirms, that the fixty-fixth degree correfponds nearly with a fpecific gravity of 1.848 ; and 

 as this number lies near the extreme of the fcale, I fhall ufe it to deduce the reft. 



BauM^s Hydrometer for Salts. 

 Temperature 55° Fahrenheit, or 10° Reaumur. 



