332 LATlTfJDE of. thx: TOWN of ERIE. 



309 feet fouth from the landing, the latitude of the beginning 

 of the Town mufl: be 42" 8' 14 N. — The magnetic variation 

 at the Town of Erie when the foregoing obfcrvalions were made, 

 was o" 43' Laft. 



I am, Sir, Avith refpect 



Yours, &c, 

 ANDREW ELLICOTT. 



To Mr. Robert Patter/on. 



N^ XXVIL 



Hifits relative to the Stimulant Effc^is of Camphor upon 

 Vegetables. By Benjamin Smith Barton, M. D. 



Read Sept. ^ | ""HE ftiiiiulant efFeds of camphor upon the 

 16, 1796. J^ human and fonie other animal bodies, are 

 well known : but 1 have not met with any experiments 

 concerning the influence of this fmgular fubrtance upon 

 living vegetables. Perhaps, the following loofe hints on 

 this fubjeft may not be entirely unworthy of the notice 

 of the Philofophical Society. 1 fhall not fail to purfue 

 the inquiry, at a future period. 



On the 25th of laft May, 1 put a piece of the woody 

 ftem of the Tulip-tree (Liriodendron 7 ulipifera) with one 

 flower and two leaves, into eight ounces of water, with 

 which I had tritm-ated, for fome time, one fcruple of 

 good camphor. The branch, which I fpeak of, was 

 taken out of a pot of water, which contained feveral 

 other flowers of the fame plant, all, to appearance, in 

 the fame flate. In a ihort time, I was ftruck with an 

 unufually lively appearance of the flower in the cam- 

 phor, whilft the others, although they had the benefit of 

 a. larger quantity of water, were fenfibly drooping. The 

 appearances exh,ibited by. my invigorated plant were the 



following : 



