CONTENTS*
Of the Properties of the bejl Barometer, andhow made , IZO, 131
'The Scale of the Common Barometer im-proved by adding thereto the Nonius, 131The Nature of the Nonius explained ., ibid*
13Z
The Use of Barometers in measuring theHeights of Places, &c. 132, 133
Tables calculatedfor that Purpose , 134
Of the Spring of the Air and its Density,
135
The Repulsive Force of the Aerial Particlesby Calculation, tbid. 137
The Air's Density proportional to the com-pound Force, Jhewn by Theory and Expe-riment, 137, 138
The Heights to which Mercury will rife inTubes with Air, 138, 139
The Nature and Theory of the Sea-gage,
139, 140
The prodigious Degree of Compression of theAir, and Force thence arising, 142
The Height of the Atmosphere, supposed uni-formly dense, determined by Experiment,
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