128 



chromosome number by the use of colchicine. The last chapter 

 gives chemical formulas for solutions used at the New Jersey 

 Agricultural Experiment Station, Purdue University Depart- 

 ment of Horticulture, the United States Department of 

 Agriculture and the Boyce Thompson Institute. 



Those who may wish to experiment with soilless growth of 

 plants at home with a few window plants will find the book as 

 useful as will those who wish to use the methods described on a 

 larger scale. The authors are both chemists, which probably ac- 

 counts for such botanical errors as "green algae (a fungus often 

 clinging to damp flower pots)," "fungi causing algae growth," 

 "chromosomes . . . minute units which . . . attach themselves 

 to the genes" and a few others. It is to be regretted that the 

 copy for the book was not read by a botanist before publishing, 

 as these errors detract from an excellent book that admirably 

 fulfills the purpose for which it was written. 



