APPENDIX II 147 



in formalin solution will furnish a proper safeguard against 

 the failure to grow. 



III. The " base of the adult cornstalk " may simply be 

 dried and the same specimens used year after year. 



IV. Read Kerner and Oliver, Volume I, Part i, pp. 86- 

 91. The student may examine the root-hairs under the 

 lenses of the compound microscope and even study the 

 finer structure of the whole root from the point of view 

 of the function of each of the different tissues. 



CHAPTER IV 



STEMS 

 General Reading 



Kerner and Oliver, Volume I, Part 2, pp. 710-723, and 724- 



736; also 465-482. 



Gray, Text-book, pp. 45-51 (top) and 69-85. 

 Allen, The Story of the Plants, pp. 161-182. 



I. Cosmos stem will do equally well. The pieces may 

 be dried and kept in that condition until a few hours before 

 using, when they should be placed in boiling water and 

 allowed to stay there until it becomes cool. Formalin 

 material, however, is better, and a supply in this fluid for 

 smaller classes does not occupy much space. 



II. It is well for the teacher or the assistant to prepare 

 thin sections for the class. Very thin and uniform sections 

 may be cut with a sharp razor in such a hand microtome as 

 that designed by Professor Bastin (Bausch and Lomb Optical 

 Co., Rochester, N.Y., No. 2550, fifteenth edition of their 



