724 EXPERIMENT STATION RECORD. [Vol.41 



actei-ized by a low content of potassium clilorid and high contents of sodium 

 chlorid and calcium chlorid. Experiments with oats showed that the pres- 

 ence of chlorin up to a certain amount was beneficial to the formation of grain, 

 but that it was very injurious beyond this ix)int. The most significant result 

 obtained was that a large amount of chlorin can be tolerated in the presence 

 of a sufficient amount of lime, which is taken to indicate that marine salts can 

 be used on soils well supplied with lime. 



Further exiieriments are reported with potash lime, manufactured by mixing 

 one part of feldspar of high iwtassium content, one part limestone, and one 

 part gypsum, all finely ground, briquetted. and burned at 1,180° C. Larger crop 

 yields were obtained with this fertilizer on a soil deficient in lime than with 

 a mixture of 80 per cent potassium chlorid, 10 per cent sodium chlorid, and 

 10 per cent calcium chlorid. The good results obtained with potash lime are 

 in a measure ascribed to its lime content. 



Lime and chalk: The pressing need for these on Essex soils, G. S. Robert- 

 son {Essex Ed. Com., East An(/Uan Inst. Agr., Chelmsford, Bui. 24 [1919], pp. 

 ^g)._Tiiis pamphlet discusses the use of lime and chalk on Esses soils. An- 

 alyses of about 90 samples of Es.sex soils show them to be relatively deficient 

 in lime, which deficiency it is thought has limited their productive capacity. 

 General information on the purchasing and use of lime is also given. 



By-product lime, B. Kosmann {Tonindus. Ztrj., .1,2 (1918). pp. 579. 580; ahs. 

 in Jour. Sac. Chem. Indus., 37 (1918), No. 23, pp. 7UA, 7Ji5A; Chem. Abs., 13 

 (1919), No. 9, p. 985). — This is a very brief summary of the various processes 

 patented for preparing a lime fertilizer from the waste liquors obtained in the 

 extraction of potassium from the Stassfurt salts. They consist essentially in 

 treating the liquor with an excess of calcium oxid. Magnesium hydroxid and 

 calcium chlorid are formed, and these together with an excess of lime form the 

 principal constituents of the product. An analysis of one sample showed a con- 

 tent of 9 per cent magnesium hydroxid, 50 per cent calcium hydroxid, and 34.26 

 per cent calcium chlorid. 



Agricultural utilization of tanning wastes, B. Fallot {Vie Agr. et Rurale, 

 9 (1919), No. 36, pp. 180-182). — This is a brief discussion of tanning waste with 

 reference to its fertilizing value. 



Analyses show that average tanning waste contains important amounts of 

 phosphoric acid, potash, and lime, and a certain amount of nitrogen. It is 

 stated that the tannic acid present may be neutralized with lime or removed 

 by treatment with a solution of iron sulphate. 



Fertilizer analyses [and registrations], A. F. Woods and H. B. McDonnell 

 (Md. Agr. Col. Quart., No. 85 (1919), pp. -iO).— This pamphlet presents the re- 

 sults of analyses and valuations of 601 samples of fertilizers and fertilizing 

 materials made in Maryland from March to July, 1919, together with a list 

 of firms and brands registered for 1919, and the text of the iMaryland fertilizer 

 law. 



AGRICULTURAL BOTANY. 



Researches on growth and movement in plants by means of the high 

 magnification crescograph, J. C. Bose and G. Das (Proc. Roy. Soc. ILondon], 

 Ser. B, 90 (1919), No. B 631, pp. 36Jt-Jf00, figs, i 7). —Describing the construction 

 and operation of the crescograph, by which it is stated very small movements 

 can be made to register their direction and amount on a greatly enlarged 

 scale, the authors give an account of the employment of this appliance for 

 making graphic records in the study of very small or brief movements of 

 plants in growth or response to stinaulus ; also of the relations of each of these 



