64 THE AMERICAN BOTANIST 



beach, later they cease to ingest food and live on the pro- 

 ducts of photosynthesis carried on by the alga cells. The 

 book, which is very appropriately called "Plant- Animals ; a 

 Study in Symbiosis" is an interesting and well written ac- 

 count of their habits and of the experiments undertaken by, 

 the author to prove, step by step the theories set up in regard 

 to them. The book is from the press of Cambridge University, 

 England but may be obtained of the American agents, G. P. 

 Putnam's Sons, New York. The price is 40 cents net. 



Here and there, in response to the demand for a general 

 science course in the high school, outlines and laboratory 

 manuals in the subject are beginning to appear. General 

 science, it may be explained, is the name given a mixture of 

 nearly all the sciences and designed to place the pupil in in- 

 telligent contact with his environment. One of the more de- 

 sirable outlines for such a course has been issued by Prof. 

 Percy E. Rowell, of the Gardenia Agricultural high school. 

 This lists nearly one hundred and fifty topics for investigation 

 which are taken from the more familiar phases of chemistry, 

 physics, geology and biology. In most of these there is first 

 a succinct statement of the facts followed by a considerable list 

 of references for further reading. In our opinion it is likely 

 to prove valuable in a course where information is the object 

 'desired. No directions for experiments are included so that 

 the teacher who would teach by the experimental method will 

 have to devise for herself. 



