40 EXPERIMENT STATION RECORD. 



Fertilizer problems, P. Wagner (DUngungsfragen. Berlin: Paul Farey, 1S96, 

 Nos.l, pp. 40; 2, pp. 39, figs. G ; 3, i^p. 56, figs. 15).— This is a third revised edition of 

 part 1 and a second edition of part 3. Part 1 contains the following articles : Is it 

 rational to fertilize Avith ground Belgian phosphate ? Can the purchase of prepared 

 pliosphate meal he recommended? Is there a cheap mineral phosphate which can be 

 used'with i)rofit as a substitute for Thomas slag? How can the farmer protect liim- 

 self against adulterated Thomas slag? Is there an easily soluble and a difficultly 

 soluble Thomas slag? What kind of guaranty should a farmer demand in order to 

 protect himself from low-grade Thomas slag and other phosphates? On what prin- 

 ciple should the trade in Thomas slag be regulated? Will it be commercially profit- 

 able to produce an easily soluble and quick-acting Thomas slag? Under what 

 conditions will fertilizing with Thomas slag be most profitable and under what con- 

 ditions Avill the use of superphosphate be preferable? What precautions must be 

 observed in field experiments with phosphates in order to avoid false conclusions? 



Part 2 contains the following articles: What crops increase the nitrogen supply 

 of the farm? What plants are adapted to the purposes of green manuring? Is it 

 true that liberal fertilizing with potash, and phosphoric acid increases the nitrogen 

 assimilation of leguminous plants? Is it true that green manuring on the better 

 class of soils is an agricultural error? Under what conditions is green manuring 

 rational and under what conditions is it to be considered a mistake? What are the 

 secondary influences of the practice of green manuring? 



Part 3 contains the following articles : What do field experiments with, fertilizers 

 tQach? Results of field experiments with fertilizers at the Darmstadt station on 

 barley, oats, and potatoes. How much phosphoric acid and potash should be applied 

 to difierent plants? How much nitrogen should be applied to wheat, oats, barley, 

 rye, clovers and other leguminous plants, carrots, beets, cabbages, potatoes, corn, 

 and tobacco? How must Thomas slag be prepared in oEder to be quick and sure in 

 its action? 



Fertilizer for plants, C. H. Thompson {Ztschr. angetv. Chem., 1S96, No. 10, p. 

 S99). — A patented process in which a mixture of 4.5 kg. soot, 7.2 kg. fine ground 

 bone, and 7.2 kg. gypsum is boiled m 225 liters of water containing 240 gm. of phos- 

 phoric acid and absorbed in peat or moss. 



The influence of carbon bisulphid on the gro^vth of plants, Mach {L'Engrais, 

 11 {1896), No. 23, p. 543). — Applications of 200 gm. per square meter increased the 

 yield of oats, corn, potatoes, and beets to a marked degree. 



The use of se-wage water on meadows in Alsace {Jour. Landtv., 44 {1896), No. 

 2, pp. 195-200). 



Note on the deposits of guano in Peru, D. Crispo {L'Engrais, 11 {1896), No, 22, 

 pp. 517, 518). 



Potassic fertilizers, G. Smets and C. Schkeiber {L'Engrais, 11 {1896), No. 22, pp. 

 516, 517). 



Superphosphate-gypsum, T. Pfeiffer {Deut. landw. Presse, 23 {1896), No. 48, p. 

 425). 



Commercial fertilizers H. A. Huston and W. J. Jones {Purdue TJnirersily Special 

 Bui., May, 1896, pp. 8). — Brief notes on the extent of the fertilizer trade in Indiana 

 and on the quality of fertilizers sold in that State, explanation of terms, and tabu- 

 lated analyses and valuations of 378 samples of fertilizers. 



Analyses of commercial fertilizers {Eentucky Sta. Bui. 60, pp. 133-142). — Tabu- 

 lated analyses and valuations of 63 samples of fertilizers, with explanatory notes. 



Inspection of fertilizers in Maine.in 1896, W. H. Jordan, J. M. Bartlett, and 

 L. II. Merrill {Maine Sta. Bid. 25, pp. i7).— Analyses of 76 samples of fertilizers 

 furnished by the manufacturers or dealers in compliance with the State law. 



Fertilizer analyses, H. B. Battle {North Carolina Sta. Bids. 37, pp. 21; 38, 

 j)p. 5).— The usual notes and explanations, and tabulated analyses and valuations 

 of 279 samjjles of fertilizers. 



