526 EXPERIMENT STATION RECORD. 



tions aiifl patent literature on this subject fnuii I lie middle (if I'.tOT to the middle 

 of 1909. 



Reference list on the electri--'. fixation of atmospheric nitrogen and the 

 use of calcium cyanamid and calcium nitrate on soils, 8. C. Stuntz ( U. H. 

 Dcpt, Af/r., liur. .svxV.s liuL 63, iip. .S.9). — This list is introduced by a brief account 

 of the development of methods of electric fixation of the nitrogen of the air. 

 Iteferences are given to patent literature as well as to scientilic and technical 

 articles. It is explained that no attempt is made at absolute conii)letenes». 

 '• What is attempted is to bring together, roughly classified, not only all the 

 most important articles on all the branches of the subject, but also as many 

 references as could possibly be verified, so that anyone having access to any 

 collection of scientific or popular literature, no matter how small, will find some 

 articles that are accessible to him." The titles are arranged chronologically 

 under authors' names in 8 classes, (1) nitrogen, including general articles, 

 (2) utilization of atmospheric nitrogen by electric fixation, and (.*>) calcium 

 cyanamid and calcium nitrate. 



The specific gravity of the more common commercial fertilizers, A. Stut- 

 ZF.R (.17(7^ JJciit. Landw. (JcsclL, 23 {I'JIO), So. J, pp. U, 10).— The specific 

 gravity of the principal fertilizing materials is given for use in the better 

 adjustment of fertilizer distributers. 



Commercial fertilizers, J. S. Bued {Vulifoniia »S'/«. Bui. 205, pp. 91-117). — 

 "The present report contains the tabulated analyses of fertilizers collected for 

 the half year ending June 30, 1909. During this period 31S samples of fertilizers 

 and fertilizing materials have been received at the laboratory. Of this number 

 39 were sent by farmers under the two-dollar fee provision, 189 were taken by 

 inspectors from purchasers' goods upon the request of the purchasers, and 32 

 were taken by inspectors from goods in the hands of agents and manufacturers." 



Analyses of commercial fertilizers, B. L. Haktwell, J. F. Morgan, and L. F. 

 Whipple {Rhode l^Jund »S7«. Bui. ISS, pp. 15-31). — ^This bulletin completes the 

 report on inspection of fertilizers during the season of 1909. Analyses and valu- 

 ations of the fertilizers are given as well as comj)arisons of the actual with the 

 guaranteed composition. " Based upon the nitrogen, total and available phos- 

 phoric acid, and potash in comi)lete fertilizers, it was found that 74 per cent of 

 the determinations were above the guaranties, 15 per cent were below, with a 

 difference of 0.3 or more, and 11 per cent were below with a difference of less 

 than 0.3." 



Analyses of commercial fertilizers, M. B. Hardin et al. {South Carolina 

 Sta. Bui. I.'f7, pp. -'iJf). — This bulletin gives in tabular form the results of analy- 

 ses of 80,5 samples of commercial fertilizers and discusses the sources of nitrogen, 

 phosi)horic acid, and jiotash in fertilizers, as well as the valuation of fertilizers. 



The sale of fertilizers and farm foods, C. F. Juritz {Agr. Jour. Cape Good 

 Hope, 35 {1909), No. 6, pp. 670-673). — This article discusses the modified regu- 

 lations regarding the sale of fertilizers and feeding stuffs which have recently 

 been issued under the act of 1907, the purpose of the article being " to explain, 

 in as simple language as possible, some of the technical requirements of the act, 

 and of the regulations framed under its provisions." 



AGEICULTURAL BOTANY. 



Some conditions which influence the germination and fertility of pollen, 

 E. P. Sandsten (Wificonxin Sta. Research Bui. .'/. pp. 1-'i9-172, flf/s. ,7).— As bear- 

 ing on the problems of unproductive orchards, the author has given an account 

 of investigations on the influence of environmental factors upon the iiroduction 

 and fertility of pollen. After a summary of the morphology and physiology of 



