The Philosophical Magazine: Comprehending the Various Branches of Science, the Liberal and Fine Arts, Geology, Agriculture, Manufactures and Commerce, Volume 41Richard Taylor and Company, 1813 |
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æra afforded alcohol ammonia ancient animals appears Arbury Hill baryta boiling calculation Camera Obscura carbonate carbonic acid centre Cloudy coffee cold colour combination combustion consequently contain convex convex lens copper crystals cumuli degree diameter disease dissolved Don Rodriguez dried Dunnose effect employed equation error evaporated experiments Fair figure fluid give glass grammes heat Hence hydrogen hydrophobia ignited inches instrument iron lactic acid latitude lecturer lens lime liquid March mass means measure meniscus ment meridian metallic method muriatic acid nature nearly night nitric acid observations obtained oxide oxygen painting plates platina portion potass pound precipitate proportion protoxide quantity salt saturated silver Society solid solution specific gravity substances sulphate of baryta sulphuret sulphuric acid surface temperature Therm thermometer tion toises vapour vessel weighed whole wind yellow
Popular passages
Page 275 - Highness is further pleased, in the name and on the behalf of his Majesty, and by and with the advice...
Page 92 - In short, every thing proves that the volatile, aromatic matter, whatever it may be, that gives flavour to coffee, is what is most valuable in it, and should be preserved with the greatest care, and that, in estimating the strength or richness of that beverage, its fragrance should be much more attended to, than either its bitterness or its astro, gency.
Page 88 - It is first roasted in an iron pan, or in a hollow cylinder made of sheet-iron, over a brisk fire; and when, from the colour of the grain, and the peculiar fragrance which it acquires in this process, it is judged to be sufficiently roasted, it is taken from the fire, and suffered to cool. When cold it is pounded in a mortar, or ground ,in a hand-mill to a coarse powder, and preserved for use. " Great care must be taken in roasting coffee, not...
Page 73 - Bengal lights as signals, chains for the linear measures, and a theodolite, and a zenith-sector made by RAMSDEN. The base measured was 6667,740 fathoms reduced to the level of the sea, and to the temperature of 62° FAHRENHEIT ; and the stations were so chosen, that four of the sides of the triangles were almost in the same line, and nearly parallel to the meridian at the southern extremity of the arc, so that their sum but little exceeds its whole extent. The lengths of these arcs in fathoms reduced...
Page 241 - Society, from the 12ih to the 26th of March, so that the greatest part of the loaf had been eaten. What remained, on. the 26th, had every appearance of bread made wholly from wheaten flour well fermented, and well tasted, without being in the least mouldy or stale, though it had been baked fourteen days. It appeared to the Committee to be...
Page 89 - When this globular vessel is blown sufficiently thin, and when care is taken to keep it constantly turning round, when it is over the fire, there is not the smallest danger of its being injured by the heat, however near it may be to the burning coals. In order that coffee may be perfectly good, and very high flavoured, not more than half a pound of the grain should be roasted at once; for when the quantity is greater, it becomes impossible to regulate the heat in such a manner as to be quite certain...
Page 353 - OF EDINBURGH Propose as the subject of the Prize Essay for the year 1815, the following question : " Is azotic gas absorbed in the lungs during respiration? •—If it is not, whence do herbivorous animals derive their azote?" A set of books, or a medal of five guineas value, will be given to the author of the best dissertation on an experimental investigation of the subject proposed by the Society ; for which all ihe members, honorary, extraordinary, and ordinary, are alone invited as candidates.
Page 140 - ... and electrical discharges infinitely stronger than atmospheric thunder ; the earth was agitated with a quickness which cannot be .described, and seemed to boil like water when subjected to the heat of a very strong fire; there was then a perpendicular rumbling or strepitus for about three or four seconds, followed by agitations in an opposite direction from north to south, and from east to west, for three or four seconds also. This short but awful period was sufficient to turn the whole city...
Page 90 - ... height, formed as accurately as possible within, to which a piston is so adapted as to close it very exactly ; and when pressed down into it, to remain in the place where it is left, without being in danger of being pushed upwards by the elasticity of the ground coffee which it is destined to confine. " This piston is composed of a circular plate of very stout tin, which is soldered to the lower part of an elastic hoop of tin, about two inches wide, which is made to fit into the cylindrical box...
Page 240 - Rumford's plan, to heat from a separate fire-place. The time from the fire being lighted till the bread was baked at twice, was five hours, in which time six pounds of Walls-end coals and three pounds of cinders were consumed, besides a small quantity of wood, used merely to light the fire.