166 ROYAL SOCIETY OF CANADA 



It has further been remarked that, in many places within the dry 

 ' bunch grass ' region of British Columbia, great numbers of young 

 ti'ees. particularly of the yellow pine, are now found springing up from 

 seed where not many years before a few solitary old trees only stood. 



Observations of this kind are of course exceedingly indefinite in 

 character, but taken in connection of those previously cited, they appear 

 to deserve mention, and to tend, so far as they go, tow^ard a like con- 

 clusion. There is indeed, and necessarily, a lack of precision in the whole 

 of the data presented here, but it has been thought worth while to place 

 them upon record, if only as a plea for further and more satisfactor}* 

 investigations. 



Having lieen able, in 1874, to show a distinct though not perfectly 

 commensurate connection between the levels held b}" the Great Lakes of 

 the eastern part of the continent and the periodic changes in solar 

 activitv as indicated by the observations of sun-spots,' it naturall}^ 

 occurred to me to compare the changes in respect to humidity of 

 the western regions with these two classes of j^henomena. It was found, 

 hoAvever, that the data are insufficient to enable any definite conclusions 

 to be reached, though such comparison as is possible, tends to show that 

 there is no correspondence in high ■ and low-w^ater periods between the 

 Great Salt Lake and the Great Lakes, but rather some reason to believe 

 that the changes may bear an inverse relation to each other in these two 

 areas respectively. 



Naturi', vol. ix., p. 504 ; Canadian Naturalist, November 1874, p. HIO. 



