STATE GEOLOGIST. 181 



7. One cubic foot of saturated brine weighs 85 lbs. 



8. One bushel of salt weighs 56 lbs. 



9. One wine pint contains 26 625 cubic inches. 



10. One wine pint of distilled water weighs 1288.915 grains. 



11. Every .001 variation in specific gravity corresponds to 



about . 25 gallon of brine required for a bushel of salt. 



12. One degree of Beaume=4° Salometer, approximately. 



13. Specific erravity= :r r 3 — ; 



r & •* 152 — iieg. Koauine. 



14. Gallons of brine to a bushel of salt=-r- '- 4 . 454. 



Deg. balom. 



Let s— per centuge of salt in any brine, 

 g=specific gravity of the brine, 

 B=its density, by Beaume's hydrometer, 

 S=its percentage of saturation, by the Salometer, 

 G=number of gallons required for 1 bu. of salt, 

 Then the value of each of these quantities may be expressed in 

 terms of each of the others, as shown by the following twenty 

 equations :* 



2603.88 



1. G= 4.464 WhenS=o, G=oo 



S 



677.008 



2. G= 4.464 " B=o,G=« 



B 



670.218 



3. G= 4.454 -« s=0, G=oo 



S 



4.454 



4. G= " g=l,G=co 



g — 1 



*As the standard bushel of salt weighs 56 lbs., 

 5600 



=pounds of brine required for 1 bu. of salt. 



s 

 And since one gallon of distilled water weighs 8.355 lbs., 

 5600 670.257 



G= = (1) 



8.855 gs gs 



But the value of s, or the per ceutage of salt in the brine, may be expressed in terms of 

 the specific gravity of the brine. For, the specific gravity of the brine is its weight divided 

 by the weight of the same bulk of water. Making no allowance for condensation of the ag- 

 gregate volume of the constituents, this would be 

 100 



S'= (2) 



s 



W-. 



2.126 

 In which w is the per centage of water in the brine, and 2.125 is the mean specific gravity 

 of salt. But experiment shows that some degree of condensation always takes place; and it 

 seems obvious that the amount of this condensation must be a direct function of the per 

 centage of salt in the solution. The data at command, however, do not seem to be consist- 

 ent with this theory nor with each other. 



'According to Dr. Ure, 100 measures of the constituents of a saturated solution, make a little 

 less than 96 measures of the brine; and this brine contains 25.5 per cent, of salt. Now, as 

 the specific gravity of this saturated solution is, by the same authority, ,1.1962, we may cal- 

 culate what would have been the specific gravity without condensation. This would bo 

 1.205-1-96 

 =1.1568 



