BAILEY. | Chemistry of Gypsum. 135 
account for the beds of gypsum rock and of gypsum sand. It> 
should be stated at first that this mineral very frequently occurs 
in the vicinity of deposits of salt, calcium carbonate, and mag- 
nesium salts, and, in fact, frequently mixed with these materi- 
als. If we examine the composition of sea water, and that of 
an inland lake, it is evident that there is a relation between the 
composition of the saline water and that of these deposits. 
COMPOSITION OF BRINES. 
Result in grains per gallon. 
DENTS By O. D. Allen,|By Von Biboa,| p 
: , F ’/By Herepaths, 
aA EERE een Dead Sea. 
SodiumyrchloriGder Galt) pees eee ere eee 6,918.15 1,671.34 6,702.73 
IRotassimmychlonig en enone ae Lk halk All Ane RU LSE oD WAR A BP fe a 682.63 
FATT OMUUTITEC Il OTT GO tae ra une amelie Spleen ane ihe banal lcm elava ce tbdc ve 3.30 
Calciumychlonidewe eee een: (50.27 excess] of chlorine. | 1,376.75 
Calciumycarbonatene ieee one aoe SLOT Oe ye ea neues eceearet| Pera ai ee ene 
Miatcmesiumach| orid esata rer Tianna 869.40 199.66 4,457.23 
PMI We Mi OTiG emameuee Ne ard. ened ese Rate es Se NEB CoS RM oe Siler 
iro nmciall Orid een wrr pee nes Sere cr aes haidesatcke selec Trace 1.50 
Manganesexcll orice nepeep ie Om circa toile lope iene careealths & eeceagemelnn acal anve 3.35 
SOGMIMM LOM ERs te ee ee CAs re ace res, 31.16 1 HOIS 
Potassium sulphate ......... 5 OP SER MER Cl Gl RE Ed ee a TIPE MOSSES Reese ee aie 
Magnesium sulphate.............. Stee 543.58 SAE OO ali ae rena yn Ara 
Mimers wil Wacoete nye onrne CONC yee Vi 49.04 93.30 38.07 
Oram Cera renew pays vers wee ea iisr ae Gals lysis aie eh ke a elevetebe Sghavay oe 34.59 
ANON IhS Bacio SU Bloht-o. Cic B SONG Get oot oO IE eae eae ee 2ASSe gilt 13,488.10 
SEC CPORA Ally Hee RE Ree Wah dain Cte a iL OAS 1.17205 
It is evident that the material in the ocean or in a sea or lake 
which has no outlet is obtained from the waters that continu- 
ally run into it, and by evaporation only the water goes off and 
the tendency is continually to become more concentrated. All 
this material has then been picked up by the water in its excur- 
sions over and through the rocks and soil. Sometimes it has 
been deposited on the earth in immense layers and then we 
have perhaps a deposit of salt or gypsum. If water runs through 
the deposit of salt it becomes impregnated with the salt, and 
the brine thus produced can be utilized commercially for the 
manufacture of salt. In Hutchinson, and other places in this 
state, there are such brines, obtained by pumping water into 
the wells that have been bored in the salt beds. An analysis of 
