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| | CHAPTER X - OF ETHER. AND THE WEIGHT AND ELASTICITY OF THE AIR |
 | | And what will appear still more surprising, is, that Ctesibius, upon the principle of the airs elasticity, invented windguns, which we look upon as a modern contrivance. |
 | | Philo of byzantium gives us a very full and exact description of that curious machine, planned upon the property of the airs being capable of condensation, and so constructed, as to manage and direct the force of that element, in such a manner, as to carry stones with rapidity to the greatest distance. |
 | | Seneca also knew its weight, spring, and elasticity; for he describes the constant effort it makes to expand itself, when it is impresssed; and affirms, that it has the property of condensing itself, and forcing its way through all obstacles that oppose its passage. |
| wesley.nnu.edu /john_wesley/wesley_natural_philosophy/duten10.htm (768 words) |
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