C 842 ) 
Wmd*lnfirument$ \ as well as at the fame Notes m a Bdfe^Vicl 
I have heard alfo ( but cannot aver it) of a thin^ fine Venice' 
glafi^ cracked with the firing and Ufiing found of a trompet qt 
Cornet (near it) founding an Unifon or a Confonant note to that of 
the 'Tone or ling of the GUji, ^y4nd I do not judge the thing 
very unlikely^ though I have noS had the opportunity of making 
thetriaL 
jh Improvement of the Bononian Stone.fhining in the dark. 
THe Worthy Signor Mailpighi in a late Letter of his to the 
Publifher, of the9r^of March, fakes notice,' that one 
Signor Zagonif^ had a way of making out of the Bononian 
Stone calcined, Sratues and Pifiures variouQy (hining in the 
dark. But he adds (to our forrow) that that perfon lately died, 
without difcovering to any body his method of preparing the 
faid Stone. . 1 
Extract of a Letter, written from Aberdeen Fehr. 17.167^, 
concerning a Man of a ftrange Imitating nature :^ asalfo of 
fever al calculus's of an unufual hignefs* 
SIR, 
I Am very fenfible of the great civility , wherewith you were 
pleafed to entertain Ma(ter ScougalUnd me,whcn we waited 
on you laft Summer^ and ftall be ready on alt occafions to give 
you that account you then defired of things phtlofophical that 
may occur here, to promote that noble defign you have in hand. 
I remember, we had the» occafibn to fpeak of a Man in this 
Country very remarkable for fomewhat peculiar in his temper, 
that inclines him to imitate unawaresall thegeftures and moti- 
ons of thofe with whom he converfeth. We then had never leen 
him our fel ves* Since our return we were together at Scrach- 
h^gie where he dwells , and, notwithftanding all we had heard 
of him before, were fomewhat furprized with the oddnefs of 
this i>(^/re/-quality. This Donald (for that is his name,; 
being a little old and very plain man, of a thinfleaderbody, 
barb been fubje^ to this infirmUy, as be told us, fromJiis very 
infancy. He ifr very loath to have it obferved, and therefore 
caSs down hi&eyes when he walks in the ftreets, and turns them 
afide when he is in company. We bad made feveral trials be- 
^qre h^ perceived our defign ^jmd afterward bad mwch ado to 
make 
