210 REMARKS ON THE PRESERVATION, &C. 



substitute for cork, the preservation of the collec- 

 tion during its transportation. After having care- 

 fully packed the subjects, every necessary precau-J 

 tion that suggested itself was used in securing the] 

 boxes against accidents during the voyage. They) 

 were individually painted and covered with oil I 

 cloth. Each box was then placed in an outer casej 

 made of the same substantial materials, and secured)! 

 in the same manner/' by which means the whol( 

 of his extensive and valuable collection of lepidopJ 

 terous insects were safely brought to England. 



Caterpillars may also be preserved by fii 

 squeezing out their entrails, and insert into the pi 

 ture a glass tube which has been drawn to a vt 

 fine point. This pipe must be blown into whil 

 the skin of the caterpillar is held over a cl 

 fire, and kept constantly turned round, until it 

 comes hardened. It is then rubbed over with 

 of spike, dried, and then placed into the cabii 

 They should be gummed to a piece of card, so tru 

 they may not be touched in lifting them, as they) 

 are very liable to be squeezed, and thus broken. 



