418 



APPENDIX. 



XVII. 



Sciurus Tredecem Striates. Medical Repository^ vol, xxi. 



XVIII. 



Proteus. American Journal of Science^ vol. iv. 



6. METEOROLOGY. 



XIX. 



Memoranda of Climaiic Phenomena and the Distribution of Solar 

 Heat in 1820. By Henry E. Schoolcraft. 



The influence of solar heat on the quantity of water which is 

 discharged from the great table lands which give origin to the 

 sources of the Mississippi was such, during the summer months 

 of 1820, that, on reaching those altitudes in latitude but a few 

 minutes north of 47°, on the 21st of July, it was found impracti- 

 cable to proceed higher in tracing out its sources. Attention had 

 been directed to the phenomena of temperatures, clouds, evapora- 

 tions, and solar influences, from the opening of the year, but they 

 were not prosecuted with all the advantages essential to general- 

 ization. Still, some of the details noticed merit attention as meteo- 

 rological memoranda which may be interesting in future researches 

 of this kind, and it is with no higher view that these selections 

 are made. 



Observations made at Geneva, iV! I^. 



