822 EXPERIMENT STATION EBCOED. 



The industrial synthesis of nitric acid and ammonia, C. Matignon {Rev. 

 Sci. [Paris], 51 (1913), II, No. 16, pp. J^Sl-^DS; Rev. Q&n. Chim., 16. (WIS), 

 Nos. 21, pp. 357-365; 22, pp. 381-388). — The progress which has been made, 

 especially in France, in the industrial application of the various processes 

 which have been proposed is reviewed. 



The formation of aluminum nitrid from alumina, carbon, and nitrogen, 

 W. Fkaenkel (Ztschr. Elelctrochcm., 19 {1913), No. 8, pp. 362-373, figs. 4; 

 Monit. Sc?i., 5. ser., 3 {1913), II, No. 864, PP- 7^1-751; Amer. Pert., 39 {1913), 

 No. 9, pp. 25-33). — A study of the influence of various conditions of temperature, 

 pressure, purity of materials, catalysts, etc., on the formation of aluminiun 

 nitrid is reported. 



The fixation of air nitrogen by means of boron compounds, A. Stahleb and 

 J. J. Elbeet {Ber. Deut. CJiem. Gesell., 46 {1913), No. 10, pp. 2060-2077, figs. 

 6). — Studies of the reactions occurring with various boron compounds under 

 high pressure are reported. 



The fixation of nitrogen by mixtures of barium oxid and charcoal, T. Ewan 

 and T. Napiee {Jour. Soc. Chem. Indus., 32 {1913), No. 9, pp. J,67-47.'{, figs. 3).— 

 This article reports the results of experiments undertaken in 1909 " in order to 

 find out whether, with the help of a suitable catalyst, it is possible to fix nitro- 

 gen by the barium process without resorting to the very high temperatures 

 hitherto employed." 



Tectonics of the potash deposits of Kalusz, eastern Galicia, F. Kossmat 

 (Jahrb. K. K. Geol. Reichsanst. [Austria], 43 {1913), No. 1, pp. 171-192, figs. 

 4). — The literature of the subject is noted and the origin and structure of these 

 deposits are discussed. 



Potash from silicates, F. Fkiedensburg {Chem. Indus. [Berlin], 36 {1913), 

 No. 15-16, pp. 4G7-470). — The commercial possibilities of various processes 

 which have been proposed for recovering potash from silicates are briefly dis- 

 cussed. 



White rock phosphates of Decatur County, Tennessee, T. P. Matnaed {Re- 

 sources Tenn., 3 {1913), No. 3, pp. 161-169, figs. 2). — The white rock phosphates 

 of this locality are found in 3 tracts, the Beech River, Rushing Creek, and 

 Whites Creek. These deposits vary in physical and chemical properties and 

 their physical character is a criterion of their chemical composition. The three 

 principal types of ore present are (1) the lamellar phosphates, which immedi- 

 ately overlie the limestones; (2) the deposits associated with chert; and (3) 

 the stony or siliceous phosphates, while in the Whites tract a pebble phosphate 

 is found deposited along the river valley, except in case of the lamellar phos- 

 phate. 



Chemical analyses of average samples taken from these three tracts showed a 

 high content of silica and aluminum due to the adhering clay, making it nec- 

 essary to wash the ore to procure a high grade of material for the manufacture 

 of superphosphate. The content of iron oxid exceeded 2 per cent but never ap- 

 proached the prohibitive amount of 4 per cent. The deposits are found over 

 an extensive area and can be located without much difficulty. 



The discovery and opening of a new phosphate field in the United States, 

 C. C. Jones {Bnl. Amer. Inst. Mining Engin., 1913, No. 82, pp. 2411-2435, figs. 

 13). — Early explorations by the author beginning in May, 1903, which it is 

 claimed "demonstrated the existence of a very large phosphate field in the high 

 intermountain country of northeastern Utah, southeastern Idaho, and western 

 Wyoming," are described. 



The composition of phosphatic slag as regards phosphoric acid and lime 

 content, E. Rousseaux and G. Jobet {Bv^l. Mens. Off. Renseig. Agr. [Paris], 12 



