KEMARK-S 



ON THE IMPORTANCE OF REGISTERS OF PERIODIC 

 PHENOMENA IN NATURAL HISTORY. 



(1.) IT has been already stated in the Introduction 

 to this work, that a Calendar of periodic phenomena 

 in Natural History may be constructed for other pur- 

 poses than those immediately connected with that 

 particular science. Observations of such pheno- 

 mena may be combined with others in Meteorology, 

 and tend to enlarge our knowledge of particular cli- 

 mates. Or, without being so combined, they may 

 serve of themselves to point out many climatological 

 considerations, of the greatest importance in certain 

 branches of human industry dependent upon the dif- 

 ferences which one climate exhibits compared with 

 another. This results from the close connection 

 which subsists between the phenomena of climate 

 and the phenomena of the animal and vegetable 

 worlds. The station, or habitat, together with the 

 geographic range, both of plants and animals, and 

 almost every feature in their history that is of a pe- 

 riodic nature, is more or less regulated by the laws 



