C *74 ] 
VIII. A Letter from Mr. Henry Baker, 
F. R. i S. to the Preficlent, concerning an ex- 
traordinary Fifh, called in Ruffia Quab 
and concerning the Stones call'd Crabs- 
Eyes. 
2S T TAVING been invited feme time 
JL JL a 8° to a Correfpondence in Muf- 
covy, with Dr. James Mounfey, one of the Phy- 
ficians to the Czarina's Armies, a Gentleman much 
e (teemed in that Country, for his Knowledge in 
Natural Philofophy, and his unwearied Endeavours 
to difcover Truth, I readily embraced fo favourable 
an Opportunity of making Inquiry concerning fome 
Things, as to which the Accounts hitherto received 
appeared to me extremely doubtful. 
I therefore defired of the DoCtor to fend me what 
Information he could depend on, firfl, concerning 
the Swallows, and other Birds of Pafiage, that arc 
obferved in Ruffia , as we have had fome Accounts 
of them that feem incredible. Secondly, concern- 
ing an extraordinary Fifh in that Country, called 
the Quab, which is reported to be firfl; a Tadpole, 
then a Frog, and at laft a Fifh. And, thirdly, I rc- 
quefted of him to inform me concerning the Oculi 
Cancrorum , commonly called Crabs Eyes , particu- 
larly as to their Production, and the Manner of their 
being gather’d. 
In Anfwer to thefe Inquiries, I was favoured by 
the DoClor with a molt obliging Letter, accompa- 
nied 
N* • 
