[ »*< 3 
It may be obferved alfo, that the above Ships came 
Home from a very hot Climate into a very cold one, 
in the midft of Winter, and that a long-continued 
Courfe of North-eafterly Winds kept on, and even 
increafed, the Cold to a great Degree that Pleu- 
rifies, Teripneumonies, & c. are commonly the Effetts 
of fuch a Conftitution of Air that the Blood of 
fuch as labour under thefe Diforders is always ex- 
tremely fizy } and that the Heat of the Weather in 
the Weft' Indies, and large and long- continued Ufe 
of fpirituous Liquors, had greatly condenfed the 
Blood of thefe poor Fellows; and that, in the Blood- 
veifels of the Thorax of fuch as die of thefe Dif- 
tempers, polypofe Concretions are not uncommonly 
found. 
I am, Sir, with the greateft Refped, 
. Tour 
Plymouth, , 
April 23. 1742. and mojt obedient, 
humble Servant , 
J. Huxham.' 
( 
VII. An 
