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weights or th part of the weight of the water, 
raifed it through one inch ; hence __l_th part would 
have raifed it through one tenth of an inch, which 
any eye may diffinguifh. 
Dr. Lewis, for whofe great abilities in chemiftry 
I have a very high refpetf, in his little treatife upon 
American potafhes, is of opinion, that the augmen- 
tation of the bulk of water doth not proceed uni- 
formly, according to the quantity of fait added ; and 
he forms his conclufion from obferving, that the Ioffes 
of weight fuftained by the fame body in different 
folutions, were not uniform, but continually dimi- 
nifhed ; the Ioffes correfponding to feven lucceffive 
equal quantities being as 24 4. 24. 234. 22. 22. 21. 
20. Upon confidering this matter in a mathematical 
light, 1 an inclined to draw a quite different conclu- 
fion ; but I will firft mention fome experiments 
which I had formerly made with a different view, 
and which agree very well with Dr. Lewis’s. 
Experiment VIII. 
I had conceived that if, in a given quantity of 
water, feveral quantities of fait, increafing in any 
arithmetical or geometrical progreffion, were diffolved; 
that the increments of fpecific gravity would increafe 
in the fame progreffion. In order to fee whether this 
conjecture could be eftablifhed by experiment, I dif- 
folved in a given quantity of water, different portions 
of fea fait, increafing in the progreffions expreffed in 
the annexed tables, where the firft column of each 
denotes the proportional quantities of fait in penny- 
weights, the fecond, the lofs of weight of a given 
5 . bod y 
