J/e get able Statkks. 6^ 
mometersi and with tinged fpirit of wine 
in them , to the fame height, as in each 
correfponding Thermometer 3 the fcale of 
degrees, of each Thermometer , being mark- 
ed on a Aiding ruler, with an index at the 
back of it , pointing to the correfponding 
tube. When at any time an obfervation is 
to be made, by moving the index, to point 
to the top of the fpirit in that tube, an ac- 
curate allowance is hereby made, for the 
very different degrees of heat and cold, on 
the ftems of the Thermometers^ at all depths 5 
by which means the fcale of degrees will 
Aiew truly the degrees of heat in the balls 
of the Thermometers^ and confequently, the 
refpeftive heats of the earth, at the feve- 
ral depths where they are placed. The ftems 
of thefc ThermometerSy which were above 
ground, were fenced from weather and in- 
juries, by fquare wooden tubes 3 the ground 
they were placed in was a brick earth in 
the middle of my garden. 
July 30. I began to keep a regifter of 
their rife and fall. During the following 
month of Augufiy I obferved that when 
the fpirit in the Thermometer numb, i, 
(which was expofed to the Sun) was- 
about 
