If; Whether Harts.horn thaw'd, and fuch like fubftance^^ 
ufing the fame method of Diftilling,yield the fame quantity of 
Liquor, which they ufe to yield, when not frozen ? 
t6. What Cold operates in the Firmentation of Liquors ?. 
17. Whether Birds and VVild Beaftsgrow white there in 
Winterj and recover their native colour in Summer ? 
i8i Whether J^olours may be con<^entered by a (harp cold ? 
E. A ftrong Decodion of Cocheneel in a fit Glafs f 
1 9. Whether the EleUrical virtue oi Amber , and the Attrar 
flive and DireUive force of the Magnet^ be changed by a vehe- 
ment Cold > 
20, Whether pieces of Iron andfteel, even thick ones, be 
made brittle by intenfe frofts^and therefore Smiths are obliged 
fjr prevention^to give their Iron & fteehtools a fofcer temper? 
:5 1\ Whether accurateObfervations evince, that all Fiflies dy 
in frvozen waters^ifche Ice be not broken/' Where it is' to be di- 
I'gently inquired into, whether the Cold it felf, or the want of 
changing or ventilating the water, or the privation of Air 3 be 
the caufe of the death of Fillies t 
22. Whether any Phyficians or Anatomifts have inquired, 
by freezing to death feme Animals ( as Rabits, Pullets, Dogs, 
Cats,C^^)aftcr whatmanner itiSj that Intenfe Cold kills Men ? 
whether they have found any Ice in the Inner parts ^andif fo, 
in which of them i Whether in the Ventricles of the Brain and 
Heart ; and in the greater Veffels ? 
Thefe rvere the ^i£riej recommended about aTwelve-month 
ago, Monfieur HueliusinahtQ Letter of hisy accompanied 
with feveral papers from others,return$ this Accompt. 
THe Inquiries you propofed to mej did impart to feveral of 
my Learned friendss but hitherto Uiave attained an Anf- 
wer but to few particulars. Among the rcft,you 1 find a letter 
of the learned johann.Sch^ffertif^PTofcfTovin thc Srvedr/b Qni- 
vcrfny at t;/?/^/, wherein he difcourles handfomly of feveral 
thingSjbeing ready to entertain a Literary commerce with you 
nbout Inch matters. Touching Amber^lam almoft ofthe fame 
mind with him^that it is a kind of Foji/ pitch or Bitumen^ leeing 
it'i> not only found on the fliore of theEoruJ/ian fea^but alfo dig* 
g/:d up in fubterraneous places^fomeG^r/wfls;^ miles diftant froiu 
