C 491 ] 
From the Hiftories of the Air and epidemic Dif- 
eafes, we learn what Conftitutions of the Air are 
produ&ive of certain Difeafes : Were we, however, 
once furnifhed with a Courfe of Statical Experiments 
of one whole Year, together with the Hiftory of the 
Weather, we, probably, might have more diftinCt 
Views of the Nature of the Difeafes themfelves, by 
knowing experimentally the Changes produced in our 
Conftitutions, difpofing us to fuch and fuch Difeafes, 
in certain Periods of the Year. 
To thefe Tables I likewife would have added an 
Analyfis of a little of my own Blood and Urine, in 
every Month, with the Blood’s Cohefion, could I 
have got the Inftruments : But that I propofe after- 
wards to do, if I can get the fame Kind which Dr. 
Langrift analyfed the Blood, &c. with, and an In- 
ftrument exactly the fame with his, for meafuring the 
Blood’s Cohefion. 
The Method I have cbferved in the Tables is this : 
I weigh myfelf twice every Day, once in the Morn- 
ing immediately after I rife, and again before I go to 
Bed at Night. As in July i. my Weight at 6 ~ a. 
was/^'A 165. 13. o. at 10 in the Night was 167. 5.4. &c. 
Twelve Ounces was the Quantity of Urine excreted 
from 67 in the Morning, to 107 that Night: And 
97 Ounces was the Urine from 10 p.m. of the Firft: 
Day, to 7 7 in the Morning of the Second Day. The 
Figures placed in the next Column, direClly oppofite 
to thefe Quantities of Urine, exprefs the Quantity 
perfpired in the fame Space of Time 5 e.g. 68 Ounces 
and 3 Drachms was perfpired betwixt 6 - a. m. and 
10 \p,m. in the Firft Day, and 23 7 Ounces the Quan- 
tity 
