148 University Geological Survey of Kansas. 
The analysis shows that this is an extremely pure rock and 
well adapted to the purpose of making plaster of Paris. 
GYPSUM FROM SOLOMON. 
There are two samples” from the vicinity of Solomon mills. 
No. 1 is arock from the mine at the mill; No. 2 is the rock that 
occurs about a quarter of a mile east of Solomon mills. This 
material is used in small quantities mixed with the material 
from the mine at the mill. 
No. I. No. 2. 
Silicaranadmnsolulblesresrcie eerste ree Tent a 0.55 0.38 
Ilrora, eral aykonoomranowam OTS}, 5a coococon ood0 poe C uous ed OdOU US Cabe 0.23 0.16 
Calciumyoxid eee eee RANT N eC the Pak Taeni ube ad Ta, oe 32.64 32.04 
Maen esi: 0X1 dG ett ce iesvacatare crcinnstet pale ei et: ALAA I DAO ae eae 0.22 0.46 
Sulphuriczanhy drider per scree ee ee Ann ee Oa en ae 45 .95 45.77 
Catbontdioxidex(calculated) eee eee Coreen een or 0.63 0.50 
Wa Cerin Feet Pe eNe os) sie at a Rea MO Cale el Re ay VA Ent te a 19.54 20.37 
toy es eae eae ec naNpecenonn sy occoaeansesetatca!. | SOs08 | (89.68 
According to the above analysis the probable composition of 
the rocks is as follows: 
No. i. No. 2 
SHUG. SVE! HHASONOONKS WOSMCKIG oo 5occcocccccccuscousvcsvecce uses 0.55 0.38 
itronvandeal uimimumMyoxid 6S nee Bee Sra ge eoaterersen at 0.23 0.16 
Maenesium'icarbonaternny earn ob Oo eihie eee ee ee 0.47 0.96 
Cail eramicarbomaite re eiey 2 ye Ge ete ieaiea A ee ne eR a OL8G| VA shee 
Calciumysulplra ter 33.0% Wee erent ce eval et Silva eta (Spall 77.81 
Wa CORY: Sieek i eet aR AIG Ae otk a, Se at ade eet ol CL Ot KO 19.54 DY 
Totals sees GoM y Sortie ko ARE ane ei} bei ee heen oe a RS 99.76 99.68 
Calculating from sulphuric acid, the average per cent. of hy- 
drated calcium sulphate (gypsum) in ten samples noticed above, 
from four localities, is 98.55. This means that the average of 
the Kansas rock known as gypsum contains only one and one- 
half per cent. of impurities. This is purer than the material 
used from Nova Scotia and New York, and compares favorably 
with other western samples. 
74. Analysis by Bailey and Whitten. 
