INTRODUCTION. XI 



STOKES (A. C.). Microscopy for Beginners. I2mo. New York, 



1887. (Harper & Brothers.) 

 BAUSCH (Edward). Manipulation of the Microscope. I2mo. 



Rochester, N. Y., 1885. (Bausch & Lomb Optical Co.) 



A collection of the native ferns of the country is interesting 

 and attractive. Good specimens should include roots so as to 

 show as much as possible of the method of growth. They 

 should be mounted on standard herbarium paper sixteen and 

 one half by eleven and one half inches. 



Let no one imagine that the study of ferns will be an easy 

 one. Patient application and careful observation are essential 

 to success, yet he who becomes once interested in the work 

 will find a subject that deepens in interest with every step, and 

 even becomes enchanting as he seeks to determine the mysteri- 

 ous processes of fern development and the marvels of fern 

 structure. 



