xlvi SPECIFIC GRAVITY. 



The degrees of Celsius', or the Centigrade, scale which are not 

 quoted, may be found by adding or subtracting for every degree 1*8 

 deg. to or from the deg. of Fahrenheit ; and those of Reaumur's or 

 De Luc's scale^ by adding or subtracting 2.25 deg. to or from Fah- 

 renheit's. 



1. To reduce Centigrade degrees to those of Fahrenheit, multiply 



hv 9, and divide by 5, and to the quotient add 32, that is, 



' C X 9 „^ ^ 

 g — + 32 = F. 



* 2. To reduce Fahrenheit's degrees to Centigrade, 

 " F.-32 y 5 



9 = ^• 



3. To reduce Reaumur's to Fahrenheit's, 

 R. X 9 



— 4- 32 = F. 



4. To convert Fahrenheit's to Reaumur's, 

 F.— 32 X 4 



—9 =^- 



Temperatures which are to he noted in the practice of Pharmaceutical 



Chemistry, 



Fahr. 



221 Temp, of boiling syrup when saturated with sugar. 



218| Water cont. ^ of common salt boils. 

 216|: « jy T*o ^^ muriatic of lime boils. 



212 





Boiling point of pure water. 



Caloi fervens, P.L. 



Temp, of water heated by a bath containing -jt- of salt ; 6 

 deg. f being lost in passing through the vessel, 

 -^^j f Temp, of water (or olive oil, or castor oil) heated by a bath 



'^ \ of pure water : 4 deg. f being lost. 

 T7ft J Water begins to simmer. 

 ^'" "I Alcohol, 22 deg. Baume, boils in a water bath. 

 173f , 30 deg. B., boils in a bath. 



1724 ,. 3f) ditto. 



17li .. 40 ditto. 



167 Very pure ether distils in a bath. 



122 Highest temp, for drying vegetables. 



-^3 (Temp, at which tea, coffee, or other hot liquors are usually 

 ■^^^4 ( drank. 



1 OOf Greatest heat of a bath that the feet will bear without pain • 

 100 to 90 Calor lenis, P.L. Temp, for digestions. 

 ^^ f Lowest temp, for drying fruits, herbs, and the like. 



' ' \ Highest temp, for fermentation. 



65 j Lowest ditto. 



goi f Temp, used in France for taking specific gravities by Baiime's 

 ^ \ hydrometers. 



