(1^7) 
L Part of a Ijtter from Mr. Benjamin BuUi- 
vmt.at Bofton^i/; New England ; fc; Mr James 
Petiverj Jpothecary^ and Fellow of the Roy- 
al Society^ in London. 'Comermng fome Na- 
tural Okfer^ations he had made in thofe Farts. 
S I R, 
TH E laft I addrefled to you, was by our ingenious 
Friend Mr. Trott^ who went hence in Oiloler; 1 
have fince received from you Mr, JoJJelins Book of New 
England Rarities^ and obferve him to belhort, but ner- 
vous. I cannot now make any defcant on your Obfer- 
vaticns upon him^ only this, that I nc^ade the fame Re- 
mark you do, about the Plague of the Back, that it is 
greatly diftanr from an Empyema, I have tafted it more 
than cnce rfonally, it feems more of a Collick^ yet is 
' undoubtedly a Nervous Dolour, The Country People 
have learned of the Indians to deep Cafloreum in Rum^ 
and fo cure it. . 
As' to the Fire-FlieSy I took fe vera! of them in July 
laft, I take them to be a Glow Worm Folant ; the Luftre 
is plac'd as in a Glowworm, Kill the Fly (as I have done) 
and you find the Scintilla a fmall Jelly like Subftance, 
the which feparated into .^toms, gives ftill, in the Dark, 
a proportionable Luftre, to the Magnitude of each 
Atom. 
1 faw Butterflies that were teftaceous, and near 
as big as a Wrens^ moti glorioufly befludded with Gold 
and Silver at Road Ijland the Mowers find them in the 
Grafs, and they hatch ia the Windows, and are a Sport 
for Children. 
Tortoifes 
