172 Miscellaneous Facts and Obscwations-. 



facilitates the discharge, and a relaxing wind acts to 

 the contrary. Whether, or how far. Electricity may 

 operate in this case, I must leave for philosophers to 

 determine. 



The juice flows for about twenty-four hours after 

 a frost, but when a tapped tree has ceased, tap a new 

 tree, and it will flow considerably, as if a certain quan- 

 tity was discharged by the frost. • The juice flows 

 from all sides of the incision. 



Cut a sugar-maple early in the morning, if the 

 night has been cold, and it will appear comparatively 

 dry and devoid of juice, in every part of the tree. 

 Cut it a few hours after, if the day is moderately 

 warm, and the juice will issue almost in streams. 



Mr. David Thomas. 

 Letter to the Editor^ dated Elk-Hill 

 f Pennsylvania J, Jpril 14/Z?, 1804. 



16. The flowering of the Cotton presented a fact 

 so singular, on my attending to it, that I shall notice 

 it in this place, although I am pretty certain it is al- 

 ready known to you. The flowers, when first blown, 

 are of a beautiful white colour, and in a few hours 

 afterwards become red ; and this is invariably the 

 case. They change their colour gradually, and when 



