57 6 



THE POPULAR SCIENCE MONTHLY. 



II. Refractors ( Continued). 



and many others. 



THE JOURNEYINGS AND DISPEBSAL OF ANIMALS. 



IN his recent elaborate work on the " Geographical Distribution 

 of Animals," Mr. Alfred Russel Wallace gives much attention 

 to the subject of migrations as among the means of dispersion, and from 

 his copious treatment of the subject, and various other sources, we 

 glean the following brief particulars upon this subject : 



