226 Mr. Livingjhn on the Effect of Shade, ^c, 



mentioned by obfervatlons. General Schuyler, upon my 

 expreffing my fuprize at the circumftance, told me, he had 

 long fmce obferved, that the fhade of the black-oak was 

 particularly noxious to wheat. To Indian corn, it appears 

 to be lefs fo, than chefnut. The JJiade of the locuft (I ara 

 compelled to ufe this term, though as you fee it does not 

 exprefs my idea) is well known to be extremely beneficial 

 to grafs grounds. — ^Think of fome mode of trying its 



EFFECTS UPON THE ANJ.MAL SYSTEM. 



Clermont, nth Augvfl, lygy 

 Dear Sir, 

 I HAVE, fmce I faw you, been confirmed in my conjefture? 

 relative to effed of light paffing through certain fubftances, 

 by the following experiment : — I feled:ed a fpot of ground, of 

 one hundred yards long, and eighteen wide near the centre ; 

 on the weft fide (the length of the ground laying from north 

 to fouth) was a tall chefnut tree, v/hich I trimmed up, fo as to 

 make the fhade of the head fall at fome diftance from the 

 tree, when the fun was about forty degrees from the horizon 

 on the fouth well end of the ground ftood a chefnut and a 

 black oak. On the fouth end, and only eighteen yards from 

 them grew a clump of mulberry trees, and one large apple 

 tree ; the fhade caft by the two lafl from 9 to ii o'clock 

 nearly meeting with that cad by the oak^nd chefnut from ^ 



