PRINCIPAUX AUTEURS A CONSULTER SUR LES DÉPOTS DE PHOSPHATE DE L'OUEST

Le Bureau Géologique des États-Unis a publié les études suivantes sur les phosphates des états de l'ouest :

BLACKWELDER, ELIOT, Phosphate deposits east of Ogden, Utah; Bull. 430, 1910, pp. 536-551.

À reconnaissance of the Dhosphate deposits in western Wyoming; Bull. 470, 1911, pp. 452-481.

DARTON, N. H., and SIEBENTHAL, C. E., Geology and mineral resources of the Laramie Basin, Wyoming; a breliminary report; Bull. 364, 1909, 81 pp.

GALE, H. S., Rock Phosphate near Melrose, Mont.; Bull. 470, 1911, pp. 440-451.

GALE, H.S., and RicHarps, R. W., Pr minary report on the phosbhate deposits in south-eastern Idaho « adjacent parts of Wyoming anä Utah; Bull. 430, 1910, pp. 457-535.

GIRTY, G. H., The fauna of the phosphate beds of the Park City formation of Idaho, Utah, and Wyoming; Buil. 436, 1910, 82 pp.

PARDEE, J. T., Some Jurther discoveries of rock Phosphate in Montana; Bull. 530, 1913, pp. 285-291.

RicnaRps, R. W., and MANSFIELD, G. R. Preliminary report on a portion of the Idaho phosphate reserve, Bull. 470, 1911, pp. 371-439.

Geology of the phosphate deposits northeast of Georgetown, Idah6; Bull. 577, 1914.

SMITH, GEORGE Oris AND OrHErs, Classification of Public Lands: Bull. 537, 1913.

STONE, R. W., and Bonnie, C. A., The Elliston phosphate field, Montana; Bull. 580, 1914, pp. 373-383.

Van Honn, F. B., The phosphate deposits of the United States; Bull. 394, 1909, pp. 157-171.

Weexs, F. B., Phosphate deposits in the Western United States; Bull. 340, 1908, pp. 441-447.

Weeks, F. B., and FERRIER, W. F., Phosphate deposits in Western United Sates; Bull. 315, 1907, pp. 449-462.

Afrique, ressources de phosphate en Alabama, existence de phosphate en Alberta—

épuisement du sol en.

Algérie, dépôts de phosphate en ‘‘Algonkienne,'’ formation

Arkansas, ressources de phosphate dans !’ Azote, sources d’

Bow, rivière...

Brachiopode, faune, près de la passe du nord de Kootenay

Buckingham, Qué...

Burling, M

exportations et importations de phosphate du. industrie du phosphate au