A COURSE. 35 



touch, which is peculiar to green vegetables. Then they 

 may be put in press into any book which is wide enough 

 to exclude the air and light. Now they may be close side 

 by side on each leaf, and need not be separated by more 

 than one thickness of paper. But still they should be fre- 

 quently examined, lest unexpected moisture should injure 

 them. 



About the last of November, when the botanizing sea- 

 son is fully past, each student should assort the whole col- 

 lection into parcels according to the classes and orders 

 marked on the labels. In this method, beginning with 

 the first class, they should be placed in a book as before. 

 Then a neat quarto volume of pretty stiff paper should be 

 made, with slips of paper making the back about three 

 times as thick as the front. In this book the plants should 

 be fastened with carpenter's glue or common paste, on 

 the left side only of each leaf 5 the labels still remaining 

 to denote the names, &c. as well as to assist in holding 

 on the specimens. 



After the plants are fastened and well dried, dissolve 

 half an ounce of corrosive sublimate in half a pint of alco- 

 hol (both may be had for a trifle at any druggist shop) 

 and slightly brush over each plant with it. This will for- 

 ever defend them from insects and improve the colours of 

 all the green parts. 



As your course will embrace but about one fourth or 

 one fifth of the season, you ought to visit your class or 

 classes in November or December, and assist them in la- 

 helling plants which they have preserved in your absence 

 and could not label accurately. 



