22 



EXPERIMENT STATION RECORD. 



used the plants were clilorotic and the root develoimieut was retarded. The 

 author believes that the assumption that the constituents of the culture medium 

 should all be in solution is incorrect. lie recommends the following solution: 

 Potassium nitrate 1 gm. per liter, calcium sulphate and magnesium sulphate 

 each 0.5 gm.. ferrous phosphate and tricalcium phosphate each 0.2.5 gm. 



On phosphoric acid of ashes, I). N. 1'kianishnikov {Abs. in Chciii. Ztfi.. -Vi 

 (1906). Xo. .17, ji. 'i-i'.)). — This is an abstract of a pai)er presented at the Sixth 

 International Congress of Applied Chemistry at Kouie. I'.Mtr,, in which pot experi- 

 ments are reported which show that the phos]ihoric acid of straw ashes is nearly 

 as effective as that of soluble phosphates. 1 be phosphoric acid of Itirch wood 

 ashes is somewhat less effective, and that of Hr wood ashes still less effective. 

 (See also E. S. H.. 17. p. S47. » 



Analysis of deposits of calcium phosphate in the United States, P. Jumeah 

 (Ami. Cliiiii. Aimliit.. U (VJOii). Xo. ■',. pit. /r;7-/7'y ).— The location, extent, and 

 composition of the hard rock deposits of Florida are discussed in this article. 

 The following comi)lete analyses of two sam])les of ground phosphate are given 

 as representing the composition of i)roduc-ts of good (piality: 



Coiiijiositidii of i'loriihi liiinl rod: iiliospliiitc. 



nCorresponding to calcium phosphate, 77.43 per cent. 

 ftCorresponding to calcium phosphate, 78.26 per cent. 



The utilization of sugar beet slump by the Dessau method, II. Ost {Ztsclir. 

 Aiifjcic. Ciiciii., 1!) iVJOC), Xo. l-'i, i>p. (jo;i-Ui:,. ////x. //).— The preparation of 

 cyanids, ammoinum sulphate, and other products from this material is briefly 

 described. It is shown that in general about one-hali of the nitrogen of 1he 

 slump is utilized by the various processes described, one-fourth as sodium cyanid 

 and about an eiiual amount as anniioiiium sul])hate. 



History of the fertilizer industry, J. Uriixi. Jr. {Bivii. Rpt. Tcini. nc/>t. 

 A(/r.. nifi.i-',. pii. :>Ji.'j-.>ll. //(/. /), — A brief general sunnnary of the history (>f tlie 

 phosphate industiy in Teiniessee, containing also notes on geology, location and 

 description, and mining of the phosphates. 



The chemical fertilizer industry, L. Schucht (Die Chciiiischr Diiiincvin- 

 (Jiixtrir. lintiiKirick: Frirdrivh Vicircf/ d- Son, 1901). pp. VII + lll'i. fif/x. 27). — 

 This is iiractically a summary intended for young chemists of the author's 

 earlier work on the manufacture of superphosphates, the second edition of 

 wdiich was pul)lishe(l in V-HYA. It deals with the i»reparation of bone meal for 

 fertilizing purixises. sui)erphosphates, double superphosphates. Thomas slag, 

 diealcium phosphate, industrial by-products, and atmospheric nitrogen, and 

 gives methods of iui.alysis of fertilizers, with various tables useful in connection 

 with such work. 



Commercial fertilizers, A. Goss and W. J. Jones. Jr. {hnliiuni Shi. Bid. ILL 

 pp. 135-208). — This bulletin gives the text of the State fertilizer, law, with 

 explanations as to how the law is adnnnistered and terms used in fertilizer 



