ISBN: 9781154975567

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not … Altro …

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1868 edition. Excerpt: ...claimed for themselves by every effort of puffs and publicity. The second, and a still more serious objection, and that I believe will truly interest the future in this young industry, is that if the argyronete and its bell has given to science the instrument with which the divers explore the depths of the sea, why may not the study of aerial spiders furnish for aeronauts--these divers in air--the complete apparatus which they require to raise themselves to any height, direct their movements, and maintain themselves at will? Have not these little animals resolved this problem for centuries? Yet the present state of aerostation does not afford ground sufficient for comparison. We are, therefore, reduced to con jecture; and, if I may be permitted to express mine, this is what I think: I believe that spiders rise to the same height where on the fine days of summer one can see the swallows and martins hover, almost lost to sight, in pursuit of gnats that people these regions of the atmosphere. I found this belief on the webs of spiders seen falling in autumn, that seem to come at least from nearly such heights. They begin to be seen at a hundred or a hundred and fifty yards, and there is no great temerity in affirming that they have already traversed a good part of their course. An observation made in 1864, if conclusive, would tend to make remoter still the habitation of spiders; for the fog that determined the fall that year was a high fog, that is to say, one of those uniform mists that hide the sky for several days together, and seem to extend to a great height. But, I repeat, this is all conjecture. One good observation would have been worth far more..v. CONJECTURES ON THE MODE OF BUILDING OF SriDERS IN THE AIR. Perhaps here I should... Paulist Fathers, Books, History, Catholic World Volume 7 Books>History <

ISBN: 9781154975567

Paulist Fathers, Paperback, English-language edition, Pub by General Books LLC Books History~~General Catholic-World-Volume-7~~Paulist-Fathers General Books LLC