104 
HINTS TO TRAVELLERS. 
should be noticed, and if any change of customary food is observed, owing 
to the failure of the supply, it should be carefully recorded. The use 
in nature of any peculiar physical conformation of animals, the object 
of ornamentation, and so forth, should also be investigated whenever 
opportunity occurs. Any facts relating to the interbreeding in a state 
of nature of allied varieties, or the converse—that is, the antipathy to 
intercrossing of allied varieties-—would be extremely interesting. In 
short, the traveller should bear in mind that facts having a philosophical 
bearing are much more important than mere anecdotes about animals. 
To observe the actions of the larger animals, a telescope or opera-glass 
will be necessary. The traveller should bear in mind, if a microscope is 
needed in his journey, that by unscrewing the tubes of the telescope in 
which all the small glasses are contained, a compound microscope of 
considerable power may be produced. 
