Proceedings of the Royal Society of London, Volume 7

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Page 41 - Cocoa-nut oil results were obtained almost as decided as from the oil of the liver of the cod, and the author believes it may turn out to be a useful substitute. The oil employed was a pure cocoa oleine, obtained by pressure from crude cocoa-nut oil, as expressed in Ceylon and the Malabar coast from the Copperah or dried cocoa-nut kernel, and refined by being treated with an alkali and then repeatedly washed with distilled water. It burns with a faint blue flame, showing a comparatively small proportion...
Page 85 - ... 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 lime, gypsum, compressed charcoal, and tanned soleleather, although not deficient in porosity, gave no osmose, apparently because they are not acted upon chemically by the saline solutions.
Page 399 - The method which I have adopted is very simple. It consists in placing a little mirror, fixed on a long handle suitably bent, in the throat of the person experimented on, against the soft palate and uvula. The party ought to turn himself towards the sun, so that the luminous rays falling on the little mirror may be reflected on the larynx. If the observer experiment on himself, he ought, by means of a second mirror, to receive the rays of the sun, and direct them on the mirror which is placed against...
Page 435 - ... is passing from the one hemisphere to the other, and when the magnetic direction in the course of its annual variation from east to west, or vice versa, coincides with the direction which is the mean declination of all the months and of all the hours. — The annual variation is obviously connected with , and dependent on, the earth's position in its orbit relatively to the sun , around which it revolves ; as the diurnal variation is connected with and dependent on the rotation of the earth on...
Page 173 - A similar appliance to the last-mentioned for the use of needlewomen. For this purpose screens are to be provided, both of green and of blue gelatine paper ; so that the white materials employed in needlework may be changed to a pleasant green, by the screen of that colour, the yellow materials to a green by the blue screen, and by one or other of these screens the reds softened down into violets or browns. 4. For either of the two last purposes on a larger scale, the gelatine paper may be attached...
Page 86 - The osmometer was of the usual bulbform, but the membrane was supported by a plate of perforated zinc, and the instrument provided with a tube of considerable diameter. The diameter of the tube being one-tenth of that of the mouth of the bulb or...
Page 89 - ... to dead matter; but such apprehensions are, it is believed, groundless, or, at all events, premature. All parts of living structures are allowed to be in a state of incessant change, of decomposition and renewal. The decomposition occurring in a living membrane, while effecting osmotic propulsion, may possibly, therefore, be of a reparable kind In other respects chemical osmose appears to be an agency particularly adapted to take part in the animal economy.
Page 356 - There can be little doubt that Major Rennell was right in ascribing the unusual extension of the Gulf-stream in particular years to its greater initial velocity, occasioned by a more than ordinary difference in the levels of the Gulf of Mexico and of the Atlantic in the preceding summer. An unusual height of the Gulf of Mexico at the head of the stream, or an unusual velocity of the stream at its outset in the Strait of Florida, are facts which may admit of being recognized by properly directed attention...
Page 416 - ... inclined, twice the distance that the sheet of lead referred to in the preceding article descended. Glaciers are, on an increased scale, sheets of ice placed upon the slopes of mountains, and subjected to atmospheric variations of temperature throughout their masses by variations in the quantity and the temperature of the water, which flowing from the surface everywhere percolates them. That they must from this cause descend into the valleys is therefore certain.
Page 488 - The first family is connected by the typical genus Lagena with the second, and by Entosolina with the fifth ; the second is united with the third through Marginulina; the third with the fourth through Globigerina ; and the fourth with the last through Uvigerina.

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