. Outlines of natural theology for the use of the Canadian student [microform] : selected and arranged from the most authentic sources. Natural history; Natural theology; Sciences naturelles; Théologie naturelle. 68 aii- consequently there can be no vacuum. The answer appears to me to be, first, that we have no proof of a vacuum ever having been formed. The Torricellian vacuum, the most perfect with which we are acquainted, is filled with the vapour of mer- cury. Davy's experiments on this point prove, at all events, the formation of a vacuum to have been, up to this time, impracticable. Seco
. Outlines of natural theology for the use of the Canadian student [microform] : selected and arranged from the most authentic sources. Natural history; Natural theology; Sciences naturelles; Théologie naturelle. 68 aii- consequently there can be no vacuum. The answer appears to me to be, first, that we have no proof of a vacuum ever having been formed. The Torricellian vacuum, the most perfect with which we are acquainted, is filled with the vapour of mer- cury. Davy's experiments on this point prove, at all events, the formation of a vacuum to have been, up to this time, impracticable. Secondly, the other two theories equally suppose the non-existence of a vacuum: according to the emission or corpuscular theory, the vacuum is filled by the matter itself, of light, heat, &c. ; according to the etherial, it is filled by the > all penetrating ether. " Of the existence of matter in the interplanetary spaces we have some evidence in the diminished periods of comets ; and where, from its highly at- tenuated state, we cannot test the character of the medium by which the forces are conveyed, we may, if we please, call this medium ether. Our assumption is, that wher'iver light, heat, &c, exists, ordinary matter exists, though it may be so attenuated that we cannot recognise it by the tests of other forces, such as gravitation. On the other hand, a specific matter, without weight, must be assumed, (?) of the existence of which there is no evidence but in the phenomena for the explanation of which its existence is supposed. To account for the phenomena, the ether is assumed ; and to prove the existence of the ether, the phenomena are cited. For these reasons / S â i. â A] m. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bovell, James, 1817-1880. [Toronto? : s. n. ]
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