- 137 



being 127.78 square feet and in the other 0.89 square feet: one 

 144 times the other. The latter, in addition to being a very low 

 yielding strain, was also very poor in quality. 



" Sufficient work has been done to direct attention to the n<* ed 

 of a more careful study of the individuality of plants and to em- 

 phasise the still more important point that this range is as wide 

 in the projected efficiency of the plants as it is in the morpholo- 

 gical differences. It may also be of service in drawing attention 

 to the necessity of obtaining fuller knowledge of the parentage of 

 plants mated, before breeding is undertaken by crossing or by hybri- 

 dising." 



D. DEWAR and F. FINN. The Making of Species. London and 

 New York, 1909, pp. xix-|-4oo, pis. 16. (Reviewed in E. S. R. t 

 March 1910. Washington). 



This book attempts to present in simple language biological 

 problems such as the natural selection theory, hybridism, fertility 

 of hybrids, Mendelian inheritance, and other factors concerned in 

 the evolution of species in Nature and under the influence of man. 

 Throughout the book there is a strong protest against the views 

 of the post-Darwinians. It is pointed out that bionomics, or the 

 science of living animals, occupies too small a place in English 

 scientific literature. In a discussion as to what species will survive 

 in the future, it is stated that the making of species, their survival, 

 and the future of biology lie largely in the hands of the practical 

 breeder. 



Dr. PAUL KNUTH. Handbook of Flower Pollination. Based upon 

 Hermann Muller's work The Fertilisation of Flowers by Insects. 

 Translated by Prof. J. R. AINSWORTH DAVIS, Vol. III. Reviewed 

 in Nature, Vol. 84, p. 66, London, July 21, 1910. 



Vol. I. Introduction and Literature. Oxford, 1906, pp. xix~}~382. 



Vol. II. Ranunculaceae to Stylidieae. Oxford, 1908, pp. vm-f-7O3. 



Vol. III. Observations on Flower Pollination made in Europe and 

 the Arctic Regions on Species belonging to the Natural Orders. Good- 

 enovieae to Cycadeae. Oxford, 1909, pp. iv-|-644. 



The English translation of this work, appearing ten years after 

 the publication of the German original, has been brought up to date 

 in many respects. 



