Gill's technological [afterw.] Gill's scientific, technological & microscopic repository; or, Discoveries and improvements in the useful arts, a continuation of his Technical repository, by T. Gill, Volumen5


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Página 38 - Travel, in the younger sort, is a part of education; in the elder, a part of experience. He that travelleth into a country, before he hath some entrance into the language, goeth to school, and not to travel.
Página 375 - Thy arts of building from the bee receive; Learn of the mole to plough, the worm to weave; Learn of the little nautilus to sail, Spread the thin oar, and catch the driving gale.
Página 138 - ... high as the common tides reach. That elevation surpassed, the future remnants, being rarely covered, lose their adhesive property ; and, remaining in a loose state, form what is usually called a key upon the top of the reef. The new bank is not long in being visited by sea birds ; salt plants take root upon it, and a soil begins to be...
Página 136 - After this, the calcareous sand lies undisturbed, and offers to the seeds of trees and plants, cast upon it by the waves, a soil upon which they rapidly grow, to overshadow its dazzling white surface. Entire trunks of trees, which are carried by the rivers from other countries and islands, find here, at length, a...
Página 138 - ... visit it and deposit the seeds of shrubs and trees ; every high tide, and still more every gale, adds something to the bank ; the form of an island is gradually assumed ; and last of all comes man to take possession.
Página 339 - That extremely minute particles of solid matter, whether obtained from organic or inorganic substances, when suspended in pure water, or in some other aqueous fluids, exhibit motions for which I am unable to account, and which from their irregularity and seeming independence resemble in a remarkable degree the less rapid motions of some of the simplest animalcules of infusions.
Página 9 - I had scarcely remained a few minutes in one place, when the step on which I stood was covered in every part with their bodies, from two to four inches in depth.
Página 360 - You will observe how beautifully the feathers of a bird are arranged, one falling over the other in nicest order; and that where this charming harmony is interrupted, the defect, though not noticed by an ordinary spectator, will appear immediately to the eye of a naturalist. Thus a bird not wounded, and in perfect feather, must be procured, if possible; for the loss of feathers can seldom be made good ; and where the deficiency is great, all the skill of the artist will avail him little, in his attempt...
Página 136 - ... tides. The heat of the sun so penetrates the mass of stone when it is dry, that it splits in many places, and breaks off in flakes. These flakes, so separated, are raised one upon another...
Página 229 - Lucerne, are great forests of spruce-fir, consisting of the finest timber, but in a situation which the height, the steepness, and the ruggedness of the ground, seemed to render inaccessible. They had rarely been visited but by the chamois hunters ; and it was from them, indeed, that the first information concerning the size of the trees, and the extent of the forest, appears to have been received. These woods are in the canton of...

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