654 RECENT P UBLICA TIONS 



Salt Lake, crystals of mirabilite and others of common salt were 

 formed, and these impressed the mud, producing straight lines though 

 without rectilinear intersections. The writer says with reference to 

 this last experiment : 



"One would hardly hold, even as a working hypothesis, that lines 

 of 200 or 500 cm. could be produced in any such way ; though the 

 supposition may be ventured that under particularly favorable con- 

 ditions a thin crystalline cake might form on shore sediments, and this 

 by a cleavage of its own might become fissured in an orderly way, the 

 cracks extending to the mud surface beneath, and marking the same 

 superficially ; or if the under stratum had a very thin top layer of fine- 

 grained material the depressions might extend through the same. A 

 fresh addition of sediment would fill the cracks and perpetuate the mud 

 marks, while the deposit of soluble mineral might be removed by solu- 

 tion. Shallow line-like depressions in the mud might possibly 

 determine the position of incipient cracks in a subsequent process of 

 slow shrinkage. However, such suppositions lack a stable experi- 

 mental foundation." 



RECENT PUBLICATIONS. 



— Bather, F. A., Uintacrinus, a Morphological Study. — Proc. Zool. Soc, 

 London, 1895, pp. 974-1004, pis. LIV-LVI, London, 1896. 



— Beyer, S. W., Sioux Ouartzite and Certain Associated Rocks. — Iowa GeoL. 

 Surv., VI, 67-112, Des Moines, 1896. 



— BouE, Marcellin, La Topographic Glaciaire en Auvergne. — Ann. de 

 Geog, 5th Ann., No. 21, pp. 277-296, pi. VII, Paris, 1896. 



— Clarke, Henry L., The Life History of Star S5'stems. — Popular Astron- 

 omy, No. 30, 31 pp., pis. XVIII-XXII. 



— Clendennin, W. W., Preliminary Report upon the Florida Parishes of 

 East Louisiana and the Bluff, Prairie and Hill Lands of Southwest 

 Louisiana. — Made under the direction of State Experiment Stations, pp^ 

 159-256, Baton Rouge, 1896. 



— Committee Report of the Research Committee Appointed to Collect Evi- 

 dence as to Glacial Action in Australia. — Australasian As. Adv. Sci., 6 

 pp., pis. XLIX-L, Brisbane, 1895. 



— David, T. W. E., Geology and Mineralogy. — Australasian As. Adv. Sci., 

 41 pp., pis. I-II, Brisbane, 1895. 



— David, T. W. E., W. F. Smeeth and J. A. Schofield, Notes on Antarctic 

 Rocks Collected by Mr. C. E. Borchgrevink. — Ro3'al Soc. N. S. Wales^ 

 32 pp., 3 pis., Dec. 1895. 



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