32 PHILOSOPHICAL TRANSACTIONS. [aNNO J 724. 



if there is any difference at all ; though that might be owing to the brandy, 

 which was stronger than Dr. Eaton's. 



The Specific Gravities of several Bodies. By M. Fahrenheit, 

 N° 383, p. 114. Translated from the Latin. 



R. S. S. 



The above neutral salt .... 2642 



Sea salt 2125 



Nitre 2150 



Alum 1738 



Very white sugar i6o6j 



Oil of vitriol 



Lixivium of pot-ash, fully 

 saturated with salt .... 



The same 



Good aquafortis . 



Spirit of nitre 



Rain water 



Rape-seed oil 



Alcohol of wine 



The same purer 



1877t 



1563 

 1571i 



i4og 



12934- 



1000 



913 



826 

 825 



Gold J9081 



Mercury 13575 



Lead 11350 



Silver 10481 



Swedish copper 8834 



Japanese copper 8799 



Iron 7817 



Malacca tin 7364 



English tin 7313 



White marcasite 9850 



Regulus of antimony .... 6622 



Brass 8412 



Rock-crystal 2669 



Homogeneous Pyrites .... 2584 



Pot-ash depurated from the 

 filth, and a neutral salt, 

 in which it more or less 

 abounds 3112 



M. Fahrenheit made the experiments several ways ; for, he weighed fixed 

 bodies, as is commonly done, first in a nice pair of scales in air, and then in 

 rain water : he discovered the weight of sails first in air, and then in a proper 

 liquor, after which he compared it with the gravity of water ; he discovered 

 the gravities of the liquors, sometimes by the arometer, described in a follow- 

 ing Transaction, and sometimes in proper vessels. 



The most simple method of finding the difference of gravity, which arises 

 from the different temperament of fluids, is, first to fill some vessels with a 

 liquor not very hot, but whose degree of heat should be discoverable by the 

 thermometer, and then to weigh it; and afterwards to fill the said vessel again 

 with hotter liquor, and weigh it as before. If the degree of heat in this second 

 experiment be again marked, you have the difference of the gravity of the 

 liquor, caused by an intermediate degree of heat, which may then be easily 

 calculated for every other degree. 



