740 EXPERIMENT STATION RECORD. 



law in 1897, and tabulated analyses of 30 samples of fertilizers fur- 

 nished by manufacturers 1 , and 142 samples collected in the open market 

 by a representative of the station. 



"The figures which are given as the percentages of valuable ingredients guaran- 

 teed by the manufacturers are the minimum percentages of the guarantee. If, for 

 instance, the guarantee is 2 to 3 per cent of nitrogen, it is evident that the dealer can 

 not he held to have agreed to furnish more than 2 per cent, and so this percentage is 

 taken as actual guarantee. The figures under the head of "found" are those show- 

 ing the actual composition of the samples. . . . 



"It is gratifying to note that, as a rule, the fertilizers sold in the State are 

 well up to the guarantee. In a few instances the particular lots of fertilizers sam- 

 pled are not unite as good as they should he; there is, however, no case which 

 appears to he an attempt to defraud. The comparisons indicate that the manufac- 

 turers do not intend to do much more than make good the minimum guarantee and 

 this is all that the purchaser can safely expect." 



Treatise on fertilizers for practical farmers, A. Stutzer (Leitfaden der Diin- 

 gerlehre fur praktische Landwirthe. Leipsic: Hugo Foight, 1897, 6. ed., pp. FIT, 131). 



Treatise on fertilizers, A. Conradi (Dungerlehre. Berlin: Paul Parey, 1897, 

 Pp. 17). 



Treatise on fertilizers, E. vox Wolff (DUngerlehre. Berlin: Paul Parey, 1897, 

 13. ed., pp. VIII, 204). — This is a revision of this standard work by J. H. Vogel. 



A theoretical and practical treatise on fertilizers, F. Larvaron ( Traite the'o- 

 rique et pratique des engrais. Poitiers: Blanchier, 1897, pp. 224). 



Text-book on fertilizers for advanced agricultural and rural schools as -well 

 as for self-instruction, J. Nessler (DUngerlehre fiir Landwirlhschafta vnd land- 

 liche Foftbildungschulen, sowie sum Selbstiunterricht. Buhl (Baden): Actiengesellschaft 

 Konkordia, 1897, pp. 48). 



Concerning fertilizers and manures, G. L. Teller (Arkansas tSta. Bui. 47, pp. 

 101-118). — A popular bulletin on this subject, a special feature of which is a dis- 

 cussion of the after effects of manure based on the experimental work at Rothamsted. 



Manure and denitrifying bacteria, H. Hitier (Jour. Soc. Agr. Brabant-Rainaut, 

 1807, No. 9). 



Barnyard manure and its economical management, F. G. Deissmann (Der 

 Slallmisi und seine sweekmdssige Behandlung. Prague: Fr. Haerpfer, 1897, pp. 24). 



Commercial fertilizers, their composition, preparation, and use, A. Ri'mpler 

 (Die kauflichen Diingestoffe, ihre Zusammensetsung, Getvinnung undAnwendung. Berlin: 

 Paul Parey, 1897, 1. ed.,'pp. 248, figs. 



Are the chemical substances used in the sterilization of human excrement 

 injurious to agricultural plants and to the beneficial organisms of the soil? A. 

 Petermann (Ann. Sci. Agron., 1897, II, Xo. 1, pp. 120-135, figs. 2).— See E. S. R., 9, 

 p. 35. 



The Tennessee phosphates, C. W. Hayes (17th An. lipt. U. S. Geol. Surrey, pt. ..', 

 pp. 513-550; abs. in Jour. Amer. Chem. Soc, 20 ( 1898), Xo. 1, Per., p. 23). — These phos- 

 phates "are classed as structural varieties of the 2 main types — the black and the 

 white phosphates, the former originating in the deposition of a bed of phosphatic 

 organisms in the Devonian Sea, while the latter is a secondary and essentially resid- 

 uary deposit due to the differential solvent action of meteoric waters on phosphatic 

 limestones. Anaylses are given only for the white phosphates, giving from 27.4 to 

 33.4 per cent of calcium phosphate (Ca ; l'.O s )." 



Fertilizer and vegetation experiments : Notes on experimental methods, 1 1 . 

 Hellriegel (Dilngungsversuch und Fegetationsversuch. Pine Plauderei iiber Forschungs- 

 Methoden. Berlin: Paul Parey, 1S97, pp. 19).— This constitutes No. 24, 1897, of Arb. 

 Dent. Landw. (resell. 



'Analyses of most, of the manufacturers' samples were published in Bulletin 33 of 

 the station (E. S. R., 9, p. 436). 



