13 CS" 

 V, Z 



PREFACE. 



IN the preface to the Course of Practical Instruction 

 in Botany , Part I., which was published in 1885, Mr. 

 Dyer intimated that it was intended that a second part, 

 comprising instructions for the practical treatment of 

 types of organisms lower in the scale of vegetation, 

 should follow the publication of Part I. After a delay 

 of over two years, which has however been unavoidable, 

 this second part is now completed, and may, together 

 with the first part, serve to indicate to students the 

 lines on which the study of the vegetable kingdom may 

 be approached through the detailed observation of a 

 few selected types. 



Here, as in Part I., the selection of the types has 

 been influenced, partly by the commonness and easily- 

 recognised characteristics of the plants chosen, partly 

 by their special adaptation to serve as typical represent- 

 atives of the groups to which they belong ; and it is 



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