oe af 
i] 
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, 
CRO—CUM 109 
Croll (James). On the opinion that the Southern Hemisphere loses 
by Radiation more heat than the Northern, and the supposed 
influence that this has on Climate. (Tract.) 
Svo. London, 1869. 
——. On the Physical Cause of the Motion of Glaciers. (Tract.) 
8vo. London, 1869. 
——. On two River-channels buried under Drift, belonging to a period 
when the land stood several hundred feet higher than at present. 
(Tract: ) Svo. Edinburgh, 1870. 
——. The Boulder-clay of Caithness, a product of Land-ice. (Tract.) 
8vo. London, 1870. 
——. The Cause of the Motion of Glaciers. (Tract.) 
Svo. London, 1870. 
——. On Ocean-currents.—Parts IIIT. (Tracts.) 2 copies of Parts 
ie & ITT. 8vo. London, 1870-71. 
——. A Supplementary Letter. (Tract.) 8vo. London, 1874. 
-_—, On the Mean Thickness of the Sedimentary Rocks of the ‘Globe. 
(Tract. ) 8vo. London, 1871. 
——. On the Transport of the Wastdale Crag Blocks. (Tract.) 
Svo. London, 1871. 
—. What determines Molecular Motion ?—The Fundamental Problem 
of Nature. (Tract.) Svo. London, 1872. 
—. Climate and Time in their geological relations. 
Svo. London, 1875. 
——. Mr. Hill on the cause of the Glacial Epoch. (Tract.) 
8vo. London, 1880. 
Cronstedt (Axel Fredric). An Essay towards a System of Mineralogy, 
translated from the Swedish, with notes, by Gustay von Engestrom. 
The whole revised by Emanuel Mendes da Costa. 
8vo. London, 177 
Regsby (W. O.). Report on the Geological Map of Massachusetts A 
7 pared by W.O.C. (Tract.) 8vo. Boston, 1876. 
Crosse (H.). See Aneas (George French). 
and Fischer (P.). tude sur la machoire et larmature linguale 
des Cylindrellidz, ete. (Tract.) 8vo. Paris, 1870. 
Crosskey (Henry William). See Brapy (George Stewardson). 
Criger (Herman). On the Meteorology of Trinidad. With an Obituary 
Notice of the Author by Alexander Williams Anderson. (Tract.) 
8vo. Trinidad, 1864. 

Cullen (Edmund). See Brreman (Torbern). | 
Cumberland (George). Reliquize Conservate. 8vo. Bristol, 1826. 
_—. On the Black Rock at Bristol. (Tract.) MS. 
Cumming (J.). On the Application of Magnetism as a Measure of Elec- 
tricity. (Tract.) 4to. Cambridge, 1821. 
—. On the Connexion of Galvanism and Magnetism (Tract.). 
7: Ato» Cambridge, 1821. 
—. On the Development of Electro-magnetism by Heat. (Tract.) 
Ato. Cambridge, 1823. 
Bskining (Joseph George). The Isle of Man; its history, physical, eccle- 
siastical, civil, and legendary. - s 8vo. London, 1848. 
——.. A Guide to the Isle of Man. Syvo. London, 1861. 
