[4 96 1 
vary as little as poflible ia the different Changes of 
the Air’s Humidity. 
In the Summer, as Opportunity ferved, I weighed 
myfelf every Hour, Second or Third Hour, through 
the Day, to inveftigate the Difference of the Urine 
and Perfpiration, in different Hours of the Day, 
under different Circumftances ; One Table of which 
I now fend you, in which the Urine and Perfpiration 
are likewife in Ounces and Drachms, and is to be 
read together with the Account of the Quantity of 
Meat, Drink, and Exercife ufed; e.g. 
July 3d, betwixt ii4-andi2Y, I drank 20 Ounces 
of Punch, ufed no Exercife, was not expofed to the 
Wind, and was cloathed in a Holland Jacket un- 
buttoned: Made in that i| Hour, One Ounce of 
flammeous Urine, and fweated fo exceflively, the 
Heat of the Air I fat in being 87, that both my Shirt 
and Jacket being wet with Sweat, was obliged to 
fhift : Whence, though the Perfpiration was, no 
doubt, greatly diminished by the Coldnefs of the 
wet Cloaths, towards the End of the 1 \ Hour, yet 
I perfpired betwixt 1 1 -J and 12-i, 14I Ounces. 
Having fhifted, and being cloathed in a Holland 
Jacket and Chinee Gown, was expofed, betwixt 12^ 
and 2-f, to the Third Degree of the Wind’s Force; 
eat iof Ounces of roafted Lamb, Bread and Shallots, 
drank 40 Ounces of Punch, and ufed no Exercife; 
in tliefe Two Hours made 3 -J Ounces of Urine, and, 
being expofed to the Wind, perfpired only 1 2 Ounces, 
though I fweated a little all the Time, and though 
the natural Heat of the Air was the fame as in the 
former Experiment. The fame Day again, betwixt 
2i and m, my Cloathing being the fame, and 
ufing 
