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...in phosphorus, both liquid and solid, which shines but does not burn, unless perhaps it is handled a bit too roughly.
We teach how to observe its various affections, namely gravity (a), which can also be reduced to weight (b): compression (c) and extension: heat and cold (e): humidity and dryness (f).
(a) Which the air pump has already exhibited above in one or another experiment, and barometers can sufficiently indicate.
(b) After the examination of the experiment in the inflated bladder, we show other ways of weighing air, namely in glass and, most conveniently of all, in an air globe, into which air is forced by the piston of a syringe.
(e) It is shown in a diving bell, placed between two ships and lowered under water. In it, the compressed air resists the rushing water in such a way that the little man enclosed in it is not made wet. A burning candle, which he carries in his hand, makes the air thinner...