[ 6*9 3 
fon we have the moft Rain : It fhould Teem there- 
fore, that the different Warmths (and confequentiy 
Rarefaction of Vapours) in the upper and lower Cur- 
rents of the Air, and thofe Currents mixing, and 
fometimes wholly interchanging, are then the more 
immediate Caufes of the Rains, if not alfo of Thun- 
der and Lightning. 
Black fleecy Clouds, formed upon a fudden Flurry of 
the Wind, are generally fucceeded by a Shower : And, 
The fhifting of the Wind in a little time almoft 
round the Compafs, in hot Weather, is often fuc- 
ceeded by a Thunder-fhower. 
Several times, when the Mercury has been a good 
while high, and fo continues, there has fallen mift- 
ling Rain ; efpecially about the New and Full Moon, 
with an Eafterly Breeze, which the Borderers on the 
Coaft of Lincolnshire and Norfolk call Tide-weather , 
and may be oceafioned by the Vapours arifing from 
the Tides, which then cover a vaft Wafh of Sands in 
their Neighbourhood. 
Thofe Vapours fometimes reach us here in North - 
amptonjhire , but I believe feldom further Weft. 
The Nights are for the moft part calmer than the 
Days 5 and the Winds feldom fettled in their 
Quarter, or at their Strength, till fome Hours after Sun™ 
rife, and generally die away again before Sun-fet. 
I fhall add no more, but that I am. 
South wick. Tours and the Society’.? 
April 2i. 3740, mo ji Obedient , 
N. Lac. 52 0 — 5 V Humble Servant) 
George Lynn, 
Sjn- 
