The Repertory of arts and manufactures [afterw.] arts, manufactures and agriculture

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Էջ 11 - Now Know Ye, that in compliance with the said proviso, I, the said Adolphe Nicole, do hereby declare that the nature of my said Invention, and the manner in which the same is to be performed, are...
Էջ 88 - VI. were allowed the space of two acres. .instead of one, and", in consequence of their stanchng thinner, were to increase annually only the fiftieth part of an inch more in girt than they would do if. they stood on one acre, this small additional increase in girt would pay an ample rent for the additional acre. In the year 1791 a paper of Observations on the Propagation and Management of Oak Trees in general, but more particularly applying to his Majesty's New Forest in Hampshire, was published...
Էջ 267 - The Bakerian Lecture ; an Account of some new analytical Researches on the Nature of certain Bodies, particularly the Alkalies, Phosphorus, Sulphur, Carbonaceous Matter, and the Acids hitherto undecompounded ; with some general Observations on Chemical Theory.
Էջ 219 - Now if we suppose sulphuretted hydrogen to be constituted by sulphur dissolte4 in its trnailtered state in hydrogen, and allow the existence of oxygen in this gas ; its existence must likewise be allowed in sulphur, for we have no right to assume that sulphur in sulphuretted hydrogen is combined with more oxygen than in its common form...
Էջ 218 - The piece of the retort containing it was introduced into ajar inverted over mercury, and acted upon by a. small quantity of dense muriatic acid, diluted with an equal weight of water, when there were disengaged two cubical inches and a quarter of gas, which proved to be sulphuretted hydrogen. In another experiment, in which eight grains of potassium were heated in a retort of the capacity of twenty cubical inches, containing about nineteen cubical inches of sulphuretted...
Էջ 157 - ... attraction of its constituent parts. In the play of affinities with respect to secondary compounds even, it rarely occurs that any perfectly pure or unmixed substance is obtained ; and the principle applies still more strongly to primary combinations. The first methods of experimenting on new objects likewise are necessarily imperfect ; novel instruments are demanded, the use of which is only gradually acquired, and a number of experiments of the same kind must be made, before one is obtained...
Էջ 156 - IN the following pages, I shall do myself the honour of laying before the Royal Society, an account of the results of the different experiments, made with the hopes of extending our knowledge of the principles of bodies by the new powers and methods arising from the applications of electricity to chemistry, some of which have been long in progress, and others of which have been instituted since their last session. The objects which have principally occupied my attention, are the elementary matter...
Էջ 259 - To all to whom these presents shall come, &c.: — Now know ye, that in compliance with the said proviso. I, the said John Henry Cassell, do hereby declare that the nature of my invention, and the manner in which the same...
Էջ 267 - ... of the spring and summer, I made many attempts to collect quantities of this substance for minute examination. When boracic acid, moistened with water, was exposed between two surfaces of platina, acted on by the full power of the battery of five hundred, an olive-brown matter immediately began to form on the negative surface, which gradually increased in thickness, and at last appeared almost black. It was permanent in water, but soluble with effervescence in warm nitrous acid. When heated to...
Էջ 337 - Moniteur before quoted. place, with similar results. Oxymuriatic acid gas was admitted till the whole of the phosphorus was consumed. Minute experiments proved, that no gaseous muriatic acid had been evolved in this operation, and the muriatic acid was consequently to be looked for either in the white sublimate, or in the fluid which had formed in the neck of the retort. The sublimate was in large portions, the fluid only in the quantity of a few drops. I collected, by different processes, sufficient...

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