Among the volumes of kindred interest already published 

 in this series are the following : 



32. Introduction to Science. By Prof. ,T. A. Thomson. 

 20. Evolution. By Prof. J. A. Thomson and Prof. P. Geddes. 



62. The Origin and Nature of Life. By Prof. Benjamin 

 Moore, F.R.S. 



9. The Evolution of Plants. By Dr. D. H. Scott, F.R.S. 

 (Illustrated.} 



72. Plant Life. By Prof. J. B. Farmer, F. R. S. (Illustrated. } 



19. The Animal World. By Prof. F. W. Gamble, F.R.S. 

 (Illustrated.} 



44. Principles of Physiology. By Prof. J. G. McKendrick, 

 F.R.S. 



57. The Human Body. By Prof. A. Keith, LL.D. 



(Illustrated.} 



17. Health and Disease. By Dr. W. L. Mackenzie. 

 38. The School. By Prof. J. J. Findlay, Ph.D. 

 54. Ethics. By G. E. Moore, M.A. 



Firat Printed April 1914 



