RECENT ADVANCES IN SCIENCE 571 



Gregory, J. W., The Ambrym Eruptions of 191 3-1 4, ibid. 

 529-40. 



Daly, R. A., The Genetic Classification of Underground 

 Volatile Agents, Econ. Geol. 191 7, 12, 487-504. 



Adams, F. D., and Bancroft, J. A., On the Amount of 

 Internal Friction Developed in Rocks during Deformation, and 

 on the Relative Plasticity of different Types of Rocks, Journ. 

 Geol. 191 7, 25, 597-637. 



Cotton, C. A., Block Mountains in New Zealand, Amer. 

 Journ. Sci. 191 7, 44, 249-93. 



Keyes, C. R., Orographic Origin of Ancient Lake Bonne- 

 ville, Bull. Geol. Soc. Amer. 1917, 28, 351-74. 



Kindle, F. M., Deformation of Unconsolidated Beds in 

 Nova Scotia and Southern Ontario, ibid. 323-34. 



Coleman, A. P., Wave Work as a Measure of Time : A 

 Study of the Ontario Basin, Amer. Journ. Sci. 191 7, 44, 



351-9- 



Davis, W. M., The Great Barrier Reef of Australia, ibid. 

 339-5° ; The Structure of High-standing Atolls, Proc. Nat. 

 Acad. Sci. 191 7, 3, 473-9; The Isostatic Subsidence of Vol- 

 canic Islands, ibid., 649-54. 



Daly, R. A., A New Test of the Subsidence Theory of Coral 

 Reefs, ibid. 664-70. 



BOTANY. By E. J. Salisbury, D.Sc, F.L.S., East Londot. College, 

 University of London. 



M. Henri Blin, in La Nature for October, deals with the 

 problem of the feeding of cattle under present conditions and 

 calls attention to the value, as fodder, of several species that 

 in normal times are almost neglected. 



As the plants cited in this connection are also common in 

 Britain, the practical data given indicate that in this country 

 also much might be done to augment the depletion of fodder 

 consequent upon restricted importation. 



The Furze (Ulex europceus) utilised for this purpose in 

 Brittany is equal in value to one-third or even half the quantity 

 of good hay, whilst Broom (Sarothamnus scoparius) also has 

 about half the feeding value of the latter. Heather, too, can 

 be utilised for this purpose, and, like the foregoing species, has 

 the merit of affording nourishment at a time when supplies 

 are usually lowest. Even mistletoe can be used as forage, and 

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