PHILOSOPHICAL 
TRANSACTIONS. 
XXVIII, c Ther? 72 ometrkal Obfervatiom at 
Derby, by Mr. John Whitehurft, com- 
municated by Charles Morton, M, D, 
Dear Sir, 
Read May i^TT 'j £ experienced a much greater de- 
W gree of cold at Derby, in the late 
froft, than perhaps was ever obferved in England ; 
and the quick tranfitions were no lefs remarkable. 
On Sunday the 1 8th of laft month, at nine of the 
clock in the evening, my thermometer flood at 20. 
At half an hour after nine, nearly one degrew below o. 
At feven the next morning, 30. external air. 
I am, Sir, 
PART II. 
Received April 9, 1767. 
Sec. R. S. 
Your moil obedient fervant, 
Derby, 
John Whitehurft. 
M m XXIX. An 
Feb. 15, 176;. 
Vol. LVII. 
