328 EXPERIMBNT STATION BECORD. 



and deposits, feldspar, mica, leucite, alunite, waste liquors from cellulose pulp 

 mills, sugar residues, and wool scourings. 



The potash situation, B. Haet {Jour. Indus, and Engin. Chem., 7 (1915), No. 

 8, pp. 670, 671). — Attention is drawn to the possibility of economic potash pro- 

 duction from so-called cement fume from cement factories and from refuse 

 heaps from feldspar mining. The economy of the process inv/)lved in the latter 

 case depends largely on the simultaneous production of alum. 



A preliminary report on the feldspar and mica deposits of Georgia, S. L. 

 Galpin {Geol. Survey Ga. Bui. 30 (1915), pp. XII +190, pis. 11, figs. 5).— Tliis 

 report contains data on feldspar and mica deposits of Georgia, including notes 

 on their commercial uses. 



It is shown that one class of the feldspars, namely, pegmatite dikes, is of 

 high quality, containing usually about 12 per cent of potash, enough to make it 

 worthy of consideration as a source of potash. Appendixes on (1) abstracts of 

 patents issued by the United States Patent Office on methods for extracting 

 potash and other substances from silicate rocks and minerals, especially feld- 

 spar, and (2) ground feldspar as a commercial fertilizer are included. 



The displacement of the potash of neutral alumino-silicates by neutral 

 salts, S. KocHEKGiN {Iz Rezul't. Veget. Opytov Lab. Robot, 9 (1913), pp. SS6- 

 391, figs. 2). — In tests of the solubility of the potash of different silicates in 

 ammonium acetate it was found that the potash of the so-called pota.«;sium 

 zeolite was the most soluble, followed In order by muscovite, nepheline, phono- 

 lite, biotite, and orthoclase. The solubility of biotite potash showed an increase 

 for from 2 to 56 days. 



The destructive distillation of Pacific coast kelps, D. R. Hoagland {Jour. 

 Indus, and Engin. Chem., 7 {1915), No. 8, pp. 673, 671,).— The results of com- 

 parative laboratory distillations of kelp {Macrocysiis pyrifera) with oak and 

 fir made at the California Experiment Station to determine some method of 

 utilizing the organic matter of kelp in addition to the potash and lodin led to 

 the conclusion that kelp distillates have no commercial value, but that most 

 of the potash may be easily recovered from the charcoal as a high-grade prod- 

 \ict. See also a previous report by Burd (E. S. R., 32, p. 723). 



Three years' experiments on the effect on the yield of crops of potash 

 works waste products containing magnesium chlorid, A. Stutzer and W. 

 Haupt {Drcijdhrige Yersuche ithcr die Wirkung von Chlortnagnesium cnthnl- 

 tender Endlage von Chlorkaliumfabriken nuf die Emtecrtrdge. Berlin: Paul 

 Parey, 1915, pp. IV +84, figs. 2). — The work of others bearing on the subject is 

 reviewed and plat experiments with oats, wheat, red beets, sugar beets, barley, 

 and rye on soil rich In lime and with hay on meadow land are reported. The 

 purpose was to determine the effect of irrigating with water containing waste 

 products from potassium chlorid works in amounts varying from the equivalent 

 of 1,500 to 2,500 mg. of chlorin per liter. 



It was found on three different meadow soils that the waste products in the 

 highest concentration iised had no bad effects on the yield of hay. The same 

 results were obtained with the other crops on the soil rich in lime. The 

 absence of injurious effect of the waste products on these soils is attributed to 

 the presence of sufficient lime in the soils to neutralize any acid products of 

 disassociation of the waste products. 



Phosphate rock and methods proposed for its utilization as a fertilizer, 

 W. H. Wagoaman and W. H. Fky {U. S. Dept. Agr. Bui. S12 {1915), pp. 37).— 

 This bulletin states briefly the origin, extent, and composition of the phosphate 

 deposits of Florida, Tennessee, South Carolina, Arkan.sas, Kentucky, .south- 

 eastern Idaho, western Wyoming, northern Utah, and western Montana, and 



