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able according acid almoſt alſo animals appear applied atmoſphere becauſe become body called carbon caſe cauſe colour combination common conſiderable conſidered contained continued covered determine direction diſtance earth effect employed equal examined experiments expoſed fame feet firſt fluid four give given glaſs grains greater ground half heat inches iron iron-ſtone Italy kind known laſt length leſs light lime manner matter means metal method mixed mixture moſt mountains muſt nature neceſſary obſerved obtained operation oxyd oxygen pieces plants plate portion prepared preſent principle produced proper proportion purpoſe quantity regard remains remarkable rendered reſpecting reſult ſame ſeems ſeen ſeveral ſhall ſhould ſmall ſome ſtate ſtill ſtone ſubject ſubſtances ſuch ſurface taken theſe thoſe tion tone uſed various vibrations weight whole wood
301. oldal - A quantity of frefli rofes (for example, forty pounds,) are put in a ftill with fixty pounds of •water, the rofes being left as they are with their calyxes, but with the ftems cut clofe. The mafs is then well mixed together with the hands, and a gentle fire is made under the ftill. When the water begins to grow hot, and fumes to rife, the cap of the ftill is put on, and the pipe fixed : the chinks are then well luted with pafte, and cold water put on the refrigeratory at the top.
179. oldal - It would have been impossible for any of these trees and shrubs to vegetate so near the sea, and below the common level of its water : the waves would cover such tracts of land, and hinder any vegetation. We cannot conceive that the surface of the ocean has ever been lower than it now is ; on the contrary, we are led by...
258. oldal - Pen-knife sharpen'd as keen as a Razor, I cut a piece of it off, and thereby left the surface of it exceeding smooth, then examining it very diligently with a Microscope, me thought I could perceive it to appear a little porous ; but I could not so plainly distinguish them, as to be sure that they were pores, much...
85. oldal - There is nothing in gypfum injurious, if it be free from lime ; it will foon become very dry and light, and the limb may be bathed with fpirits, which will penetrate through the covering. Spirits may be ufed inftead of water, or mixed with it (or vinegar) at the firft making of the plafter.
85. oldal - Virgil calls this fourth day a very sure prophet. If on that day the horns of the moon are clear and well defined, good weather may be expected ; but if they are dull, and not clearly marked on the edges, it is a sign that bad weather will ensue. When the weather remains unchanged on the fourth, fifth, and...
218. oldal - A want, or too great a quantity of dew, being a mark of a strong evaporation, announces rain ; the case is the same with thick, white, hoar frost, which is only dew congealed. J2. The winds which begin to blow in the day time, are much stronger, afld eiv...
130. oldal - This bird, after it was caught, was shut up in a large hen-coop ; and the next morning M. Cronstedt found a young partridge lying dead before the door of the coop.
324. oldal - Fifthly, that the dissolution of sulphureous bodies is made by a substance inherent, and mixt with the Air, that is like, if not the very same, with that which is fixt in Salt-peter, which by multitudes of Experiments that may be made with Saltpeter, will, I think, most evidently be demonstrated.
324. oldal - ... till it be precipitated. Seventhly, That as there is one part that is dissoluble by the Air, so are there other parts with which the parts of the Air mixing and uniting, do make a Coagulum, or precipitation, as one may call it, which causes it to be separated from the Air, but this precipitate is...