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aerometer ammonia ancient angle appears arts ascertained atmosphere Bambusa blue bodies Caldas da Rainha carbonate chloride chymical chymistry cinders circle colours consists containing copper crystals degree direction Disperis distance Ditto earth effect equal exhibited experiments feet feldspar flame flax given number glass green Greenland Guaduas heat Hill and Bundy's horizontal hornblend hydrometer improvement inches instrument iron island kaleidoscope lava Lee's length light machine magnetic means measure meridian metal mountain muriatic muriatic acid nature nearly needle nitric acid object observed obtained oxide oxygen paper particles pendulum pistils plates platinum potash present produced proportion quantity rays reflected reflectors result river rock Royal salt sciences Scirpus seen solution species specific gravity stamens stone substance sulphur supposed surface Tabasheer tangent screw telescope temperature thermometer tion tube vegetable wire Zaire
Pàgina xxii - Hudson's Bay Company, and his attempt to establish a Colony on the Red River; with a Detailed Account of his Lordship's Military Expedition to, and Subsequent Proceedings at Fort William, in Upper Canada.
Pàgina 324 - B. placed the fluids in a trough formed by two plates of glass cemented together at an angle. The eye being necessarily placed at one end, some of the cement which had been pressed through between the plates appeared to be arranged into a regular figure. The symmetry of this figure being very remarkable, Dr B.
Pàgina 332 - ... instrument is directed, if it only be in its proper place the effect just described is sure to take place, and with an endless variety. In this respect, the kaleidoscope appears to be quite singular among optical instruments. Neither the instrument of Bradley, nor the experiment or theorem in Wood's book, have any resemblance to this ; they go no further than the multiplication of the figure.
Pàgina 9 - ... withhold their protection from the fine arts, and debar themselves of the pleasures derived from works of literature and taste. Strange and novel as the assertion may appear,, it is no less true, that .the advantages and enjoyments which these studies and pursuits afford, are not only obtained without any expense to the country in which they are encouraged, but, that they actually repay, in wealth and emolument, much more than they require for their support. To •what are all the astonishing...
Pàgina 294 - The notion that these bodies come from the moon is, when considered, neither absurd nor impossible. It is quite true, that the quiet way in which they visit us is against such an origin ; it seems, however, that any power which would move a body 6000 feet in a second, that is, about three times the velocity of a cannon ball, would throw it from the sphere of the moon's attraction into that of our earth.
Pàgina 161 - Padron, it is stated that the river put on a majestic appearance, that the scenery was beautiful, and not inferior to any on the banks of the Thames ; and the natives of this part all agreed in stating, that they knew of no impediment to the continued navigation of the river; that the only obstruction in the north-eastern branch, was a single ledge of rocks, forming a kind of rapid, over which however canoes were able to pass.
Pàgina 294 - While we are considering the possibility of these considerations it may be remembered, that in the great laboratory of the atmosphere, chemical changes may happen, attended by the production of iron and other metals ; that at all events such a circumstance is within the range of possible occurrences ; and that the meteoric bodies which thus salute the...
Pàgina 182 - It is generally admitted that, for the last four hundred years, an extensive portion of the eastern coast of Old Greenland has been shut up by an impenetrable barrier of ice, and, with it, the ill-fated Norwegian or Danish colonies, which had been established there for more than an equal length of...
Pàgina 168 - The length of the pendulum vibrating seconds in the latitude of London forms the standard of the British measure of extension.
Pàgina 394 - The || Travels || of || Marco Polo, || a Venetian, || in the Thirteenth Century : || being a || Description, by that early traveller, || of || remarkable places and things, || in || the || Eastern Parts of the World. || Translated from the Italian, || with || Notes, || by William Marsden, FRS, &c.