The Year-book of Facts in Science and Art

Voorkant
Charles W. Vincent, James Mason
Lockwood & Company, 1855
 

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Pagina 200 - ... other substances. A large but variable number of atoms of water are associated together to form a liquid molecule of water, of which an individual atom of oxygen stands apart, forming a negative or chlorous radical, while the whole remaining atoms together are constituted into a positive or basylous radical ; which last will contain an unbalanced equivalent of hydrogen giving the molecule basicity, as in the great proportion of organic radicals. Now, it is this voluminous basylous radical...
Pagina 117 - ... most luxuriantly in elevated and dry regions. The gum exudes spontaneously, in a semi-fluid state, from the bark of the trunk and branches, and soon hardens by exposure to the atmosphere, forming more or less rounded and variously- colored masses, weighing each from a few grains to several ounces.
Pagina 78 - ... to be made of sheet iron. In Martin's new Jacquard machine, the object had been to substitute for the heavy cards, a sheet of prepared paper punched with given apertures, like the cards of the old machines, but instead of being a series of pieces...
Pagina 223 - Fuchs's method is as follows :{ — " ' Clean and washed quartz-sand is mixed with the smallest quantity of lime which will enable the plasterer to place it on the wall. The surface is then taken off with an iron scraper, in order to remove the layer formed in contact with the atmosphere ; the wall being still moist during this operation. The wall is then allowed to dry ; after drying it is just in the state in which it could be rubbed off by the finger. The wall has. now to be fixed, ie, moistened...
Pagina 200 - Osmose is, indeed, eminently the phenomenon of weak solutions. The same substances are likewise always chemically active bodies, and possess affinities which enable them to act upon the material of the earthen-ware septum. Lime and alumina were accordingly always found in solution after osmose, and the corrosion of the septum appeared to be a necessary condition of the flow. Septa of other materials, such as pure carbonate of...
Pagina 200 - ... travels in the electrical decomposition of pure water, and resolves itself into hydrogen gas and water at the negative pole, causing the accumulation of water observed there, while the oxygen alone proceeds in the opposite direction to the positive pole. Attention was also called to the fact, that acids and alkalies, when in solution, are chemically combined with much water of hydration ; sulphuric acid, for instance, evolving heat when the fiftieth equivalent of water is added to it. In the...
Pagina 256 - Y nearly half an inch long, by an eighth wide, egg-shaped at the point, and beset with minute teeth, which cause them to cling. The stems are very brittle, so that whenever the plant is disturbed, fragments are broken off.
Pagina 224 - ... both consumed by a given weight of animal within a given time, and required to yield a given weight of increase. The...
Pagina 240 - I intended to take a piece from the thin part of the belly, when what was my surprise to see coming from the opening thus made a small live fish. This I at first supposed to be prey which this fish had swallowed, but on further opening the fish I was vastly astonished to find next to the back of the fish and slightly attached to it a long very light violet bag, so clear and so transparent that I could already distinguish through it the shape...

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