>696 Col. roy’s Experiments for 
thing elfe mixed with the former, which is brought into 
its greateft degree of add ion, about the temperature of 
57 0 of Fahrenheit, muft be left to the inveihgations 
of future experimenters : I only relate things as I found 
them after many repetitions, without being able to dif- 
cover any material difference in the refults, even when 
the air was rendered more or lefs denfe by an addition 
to, or l'ubtradtion from, the weight wherewith it was 
loaded. The thermometrical, compared with the mano- 
metrical fpaces, will therefore appear as in the following 
Sable, 
Spaces 
