Table III. — Gypsum or Land Plaster, 



Note: — Calcium sulfate does not neutralize sour soils. The small amount of calcium and 

 magnesium carbonates present in the gypsum would, however, be effective for this purpose. The 

 two samples analyzed contained an average of about one-twelfth as much calcium and magnesium 

 carbonates as does fine ground limestone. 



Publication of this Document Approved by Commission on Administration and Finance. 

 2m — 1-'31. No. 873. 



