[ S27l 
11 Part of a Letter from the Kevetend Mr Der- 
ham to Vr Sloane, giving an account of his 
objervations of the vpeather for the Tear p^. 
Upmnfier, Jan. 2;, 
SIR, 
IHere fend you the Tables of my laft years obfervati- 
ons 5 together with which I think it convenient 
to fend fome few remarks relating thereunto. 
I promised laft year the addition of two Columns to 
each Months obfervations, which are here inferted* 
The one ftiewcth the Flj/wg of the Clouds^ concerning 
which I defire it may be obferved, that I have never 
fet down the Point towards which the Clouds flew ^ 
but when they varied from the Winds. In all thofe 
vacancies therefore in the Column ot Clouds, it is to 
be fuppofed, that either there were no Clouds at all ap- 
peared, or their motion was not difcernible, or that 
they flew in the fame track with the Winds, 
Concerning the Thermometer^ it is neceffary that I 
fliould tell you, that the graduation of itisby lnch- 
meafure, viz. Inches and tenths of Inches. The point 
oi Freezing is at about 8b, or at moft 8' 2 degrees, and 
confequently 'tis Cold at about 90, and lemperate a- 
bout 100 degrees. I need not fay, that the Degrees 
above 100 are Warm or Hot 5 and thofe below 80 are 
Harder Frofis. The Degrees of my Thermometer 
reach to 24b, altho I could never make the Spirits de- 
fcend with Artificial Freezing, much lower than 50, 
neither when exposed to the heat of a pretty ftrong 
Sun, did they afcend above 225. 
N n n n The 
