RULES FOR PRESERVING, ETC. 



xxix 



branching, as the one stem can be held down quite firmly while the other is being 

 cut; whereas one only, if very slender, cannot be thoroughly secured during the 

 process of cutting. 



Were the mechanical part now described the worst difficulty in the examination 

 of sea-weed structure, all the world might be made learned by algological durcli- 

 schnitts; but the delicacy of eye and judgment requisite for understanding the 

 meaning of what is seen, is a part of the matter not so easily taught or acquired. 

 Courage, however! A comparison of fresh-gathered and dried durchschnitts of the 

 same genera; a habit, if possible, of making drawings of everything one sees; and 

 a patient acquiescence with the necessity of being twenty times mistaken at first 

 for every once one is right, will go a long way towards making a scholar in its 

 secondary sense, out of a mere scholar or amateur. 



