C 18* ] 
fometime$,if very much heated, will, asfoon as they 
come to the open Air, catch Fire, and fo produce 
thofe fiery Eruptions, of which there are fo many 
Inftances in the World. 
VII. A Letter from Mr. Henry Forth 
to the late Rev d William Derham, 
2). 2). Canon o/'Windfor, andF.R S. 
concerning the Storm Jan. 8th, 17 gf. 
‘Darlington , Jan. 18, 1735. 
Honoured Sir, 
A L T H O’ I am not fo happy as to be acquainted 
with your Perfon, i am no Stranger to your 
Labours, wherewith you have obliged the World; 
and that Part which relates to Oblervations upon 
the Alteration of the Weather, I have for lome 
fmall time purfued, for my own private Satisfaction, 
upon your ingenious Model. 
The difmal Accounts wc have had from the 
Southern Parts, of the Storm of Wind which hap- 
pened on the 8th Inftant, put me upon reflecting, 
that one of your Curiofity might defire to know 
how our Northern Regions were affeCted by it ; 
which will, I hope, be a fufficient Apology for this 
Liberty. 
The Place from which 1 write, and where I re- 
fide, is 14 Miles South of Durham , Lar. 5-4° 4 6'. 
The Evening before the 8th, my Barometer flood 
O o a at 
