( & ) 
the Society was pleafed to do me the Honour to en- 
truft me with. 
In that T’ranfatfion I have made it very probable, 
that the greateft Defcent of the Spirits in the Thermo- 
meter, was on December 30, 1708, when my Glafs 
was within one Tenth of an Inch as low as it is with 
artificial Freezing with Snow or Ice and Salt : And in 
the late Froft it was altnoft, if not altogether, as 
low. 
The Freezing-Point of my Thermometer is 10 
Inches (which I call 100 Degrees) above the Giobe 
of Spirits ^ and the molt intenfe Freezing (according 
to the Methods I have mentioned in that FranfaUion ) 
is juft at, or very little within the Ball. And on Ja- 
nuary 30, about Sun-rifing, the Thermometer was but 
an Inch, or 10 Degrees above the Point of extreme 
Freezing ; and on February 3, at only half an Inch, 
Or y Degrees. And confidering that the Thermometer 
I obferved with in 1708, was lefs accurate, and differ- 
ently graduated from that which I now have, I am 
apt to think, that the Froft on February 3 laft, was 
altogether as intenfe as that on December' 30, 1708. 
For although a Frigorifick Mixture funk the Spirits 
but one Tenth lower in the old Thermometer, and 
about y or 6 Tenths in that I now obferve with, yet 
I take the Difference to be little, or none at all, by 
reafon of. the Tendernefs of the new above the old 
Glafs. 
And this Degree of Cold I take to be as exceffive as 
in any of the Years mentioned in the faid Franfadtion j 
yea, any of the Years, when the Fbames at London was 
frozen over : 1 am fure colder than in the Year 1716, 
C when 
