684 MANUAL OF NATURAL HISTORY. 



of these, the " Ordeal Bean/' of the old Calabar, the 

 fruit of one of the Fabacece has been lately received 

 and examined by Dr. Christison. 



All dried specimens should be packed with cam- 

 phor, to keep off attacks of insects, and should be 

 placed during transmission in cool, dry places. 

 Living specimens require to be kept in dry, airy 

 situations. When specimens cannot be brought 

 away, or if they are likely to lose their natural form 

 during transmission, accurate drawings should be 

 made, the tints also of colours which alter much in 

 drying, should be shaded in. When objects are too 

 bulky, such as trunks and branches of large trees, 

 their dimensions should be measured and carefully 

 noted. 



Ill GEOLOGY AND MINERALOGY. 



The Geologist or Mineralogist, before setting forth 

 on his travels, should furnish himself with the fol- 

 lowing articles : 



1. Hammers. A large one, of about two pounds 

 weight, compressed in form, both extremities wedge- 

 shaped, the one end being sharp-edged longitudi- 

 nally, and the other end truncate ; also a small one, 

 of which the sharp edge may be horizontal, for 

 trimming specimens. 



2. Iron chisels, of these three or four should be 

 provided, about 7 inches in length, like those used 

 by stone-cutters. 



3. A set of small boring instruments. 



