BAILEY. | : Chemistry of Gypsum. 148 
GYPSUM FROM IOWA. 
The following analyses are given of samples from Fort Dodge 
by G. E. Patrick :” 
Selected) op, | Middle. | Bottom. 
sample. 
Calciumysuilpmatennay emacs ene cels oh aera 78.44 | 78.37 | 78.54 | 78.44 
Water (call culated) inves ate sieve tee Hire lctas, alba AD 0G || BO 78) || BOW | AO. 
AS OMMOLEHROSTCMUIC Ree y a recestae Als 2 coterie! ale ales (GOs: Va ae etre (Meee cece [frit ae 
ARG tall Srey cece on imevarirate Ae Gt rR Aine Lh W8)t33 | SHA | OF. |) Gs)240 
GYPSUM FROM MICHIGAN. 
Michigan alabaster, Western Plaster Works, Chicago; analy- 
sis by Geo. H. Ellis, who says that it is the finest grade of gyp- 
sum he ever analyzed : 
No. 1. | No. 2. | No. 3. | No. 4. | No. 5. | No. 6. 
Silica and insoluble residue ............ Dh 
We 4b} Mekos} 113.0) 1) G20 
Calciumeycarbonaewnee nee eee 20} BF | 12.0.) BO |) coco | 22.0 
Hydrated calcium sulphate (gypsum)...| 88.8 | 88.9 | 83.2 | 72.0 | 87.0 | 72.6 
Ocherpmlatterre ener yee byecarsi 5 sires Seas [een bee! Dede etey Pichia Rts 
No. 1, Coalinga. No. 2, Nevada Gypsum and Fertilizing Company. No. 3, Bakersfield mine. 
No. 4, Southern California. No. 5,San Francisco. No.6, Los Angeles. 
A more complete analysis from the same source is the follow- 
ing, from Lemore, Tulare county : 
Silicarandginsolulblesmattersie cee eee eee 10.78 
Ha O TA Osxel Gl Open nenve eee sy COM nN UH ia suave at time, <p AGERE SON DLL jeenea ILL 5 3183 
PANT TIMI ATIARO XA ClO Mp Rte an eis rarshay late eae intl. Aili ii 
Mig ome SITIO xd Le wey Aes ue ses iat Maar aera tee tice) paths 21 
SodimmyoxiGdenawe esas a AS Ra cA oC Nica CRM ACA G aE BE ? 84 
IROGASSTUMTIO Xd GCM Min neers Manne ME Te lan yeuuees, BR os Pihpe LO sue as! 1.24 
CO VCiUMRS Ul Mabe mmen me eee ANe earl) Seu ruta: Palle RAM 9 ali 66 .20 
WAY UBENP oo a ek NE ne i Te era a 8.83 
100. 
67. Geological Survey of Iowa, Vol. III, p. 291. 
68. Univ. of Cal. Exp. Station, 1891-’92. 
