... Isaac Newton having observed that inflammable bodies had a greater refraction, in proportion to their density, than ... diamond was capable of resisting the effects of a violent heat when the air was carefully excluded, ... remained to be determined whether the diamond was a distinct substance, or one of the known inflammable ... this question till M. Lavoisier, in 1772, undertook a series of experiments for this purpose. He exposed the diamond to the heat produced by a large lens, and was thus enabled to bum ...
Tópico(s): Historical and Literary Studies
1797 - Royal Society | Philosophical Transactions of the Royal Society of London
Publication date from CaNSHD. First published in 1787 as 'A new, royal, and authentic system of universal geography'. Pencilled date in BL copy [1791?] ...
0000 - Gale Group | SASII
Edward Pigott, Henry Englefield,
... by determining their periodical changes of light, established a strong affinity between them and our sun; and ... with changes perhaps even sufficiently rapid to afford a ready means for determining accurately differences of terrestrial longitudes. This would be a most satisfactory, useful, and profitable discovery, and may be the lot of those who have but a slight knowledge of astronomy, provided that with great exactness, and a good memory, a constant look out be given. The discoveries which , ... Crown . The constellation of Sobieskiʼs Shield consists of a very few stars, and was formed by Hevelius, ...
Tópico(s): Historical and Architectural Studies
1797 - Royal Society | Philosophical Transactions of the Royal Society of London
Publication date from CaNSHD. First published in 1787 as 'A new, royal, and authentic system of universal geography'. Pencilled date in BL copy [1791?] ...
0000 - Gale Group | SASII
... d'un professeur de Bologna, Mr. Galvani, qui a paru il y a à-peu-près un an, avec ce titre; Aloysii ... autres celui du Dr. Brugnatelli de Pavie, qui a pour titre, Giornale Fisico-medico; auquel j'ai ... Banks. pour être communiqué, s’il le croit à propos, à cette savante Compagnie, corame un foible temoignage de ma reconnoissance pour 1'honneur qu’elle m’a fait de m’associer à son corps, et de inon zele et empressement à répondre à son invitation de lui faire part, de terns ...
Tópico(s): Neurology and Historical Studies
1793 - Royal Society | Philosophical Transactions of the Royal Society of London
Wellcome Library, London. Series: Iconographic Collections.
0000 - Gale Group | NCCO Photography
... which are supposed to be the results of a uniform tension of a surface, resisting the pressure of a fluid, either uniform, or varying according to a given law. Segner, who appears to have been the first that maintained a similar opinion, has shown in what manner the ... is evidently the cause of the want of a perfect coincidence of some of his experiments ... experiment; that is, that for each combination of a solid and a fluid, there is an appropriate angle of contact ... glass and water, and in all cases where a solid is perfectly wetted by a fluid, is ...
Tópico(s): Advanced Thermodynamics and Statistical Mechanics
1805 - Royal Society | Philosophical Transactions of the Royal Society of London
... considered as deviating from my subject, ill taking a cursory view of the labours of others.The ... it deserves our serious attention.The passage over a deep and rapid river, the coustruetion of a great and noble edifice, or the combination of a more complicated piece of mechanism, are arts so ... writers are founded, have given rise to such a multiplleity of contradictory conclusions, that it is difficult ... us.Emerson, in his Mechanics, has'laid down a number of rule~ and approximations.Professor Robison in ...
Tópico(s): Historical Philosophy and Science
1819 - Taylor & Francis | The Philosophical Magazine
A. 392 War Office: Reports, Memoranda and Papers (O and A Series). Notes on St. Helena by General Officer Commanding, South Africa, after Inspection Dec. ...
0000 - Gale Group | NCCO EuropeAfrica
... on the methods of appreciating the accuracy of a long series of observations in general, I have ... I have obtained from my investigations, in such a form as might serve either to accompany the ... to be laid before the Royal Society as a distinct communication. 1. On the estimation of the advantage of multiplied observations . It has been a favourite object of research and speculation, among the ... accuracy of experimental results, maybe reduced to a numerical form. It is indeed true, that this ... inclination to employ the doctrine of chances as a sort of auxiliary in the pursuit of a ...
Tópico(s): Probability and Statistical Research
1819 - Royal Society | Philosophical Transactions of the Royal Society of London
A. 392 War Office: Reports, Memoranda and Papers (O and A Series). Notes on St. Helena by General Officer Commanding, South Africa, after Inspection Dec. ...
0000 - Gale Group | NCCO EuropeAfrica
... and varied refractive and dispersive powers, render glass a most important agent in the hands of the ... is frequently stopped in her progress by them; a fact fully proved by the circumstance that Mr. ... first opticians, has not been able to obtain a disc of flint glass four inches and a half in diameter, fit for a telescope, within the last five years, or a similar disc of five inches in diameter within ... solution of the same practical problem. He was a man of profound science, and had all the ... knowledge they acquired was altogether practical and personal, a matter of minute experience, and not of a ...
Tópico(s): History and Developments in Astronomy
1830 - Royal Society | Philosophical Transactions of the Royal Society of London
A. 392 War Office: Reports, Memoranda and Papers (O and A Series). Notes on St. Helena by General Officer Commanding, South Africa, after Inspection Dec. ...
0000 - Gale Group | NCCO EuropeAfrica
... the Portable Oil-gas Company, is colourless, of a specific gravity less than that of water; insoluble ... alcohol, ether, oils, &c.; and combustible, burning with a dense flame. It is strikingly distinguished from the ... 250°, or above, for ebullition. By repeated distillations a series of products were obtained from the most ... 200°. On subjecting these, after numerous rectifications, to a low temperature, it was found that some of them concreted into a crystalline mass, and ultimately a substance was obtained ...
Tópico(s): Spacecraft and Cryogenic Technologies
1833 - Royal Society | Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London
A. 392 War Office: Reports, Memoranda and Papers (O and A Series). Notes on St. Helena by General Officer Commanding, South Africa, after Inspection Dec. ...
0000 - Gale Group | NCCO EuropeAfrica
... deception which Dr. Roget describes, takes place when a carriage-wheel, rolling along the ground, is viewed through the intervals of a series of vertical bars, such as those of a palisade, or of a Venetian window-blind. In these circumstances, all the ... their position recedes from the vertical, and being a maximum for the horizontal spokes. The convexity of ... to Dr. Roget the proper mode of obtaining a clue to their explanation. It results from his experiments, that a certain degree of velocity in the wheel is ...
Tópico(s): Historical Geography and Cartography
1833 - Royal Society | Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London
A. 392 War Office: Reports, Memoranda and Papers (O and A Series). Notes on St. Helena by General Officer Commanding, South Africa, after Inspection Dec. ...
0000 - Gale Group | NCCO EuropeAfrica
... Mr. Tulley’s compound achromatic microscopes, consisting of a combination of object-glasses of short focus and ... attention; and as it is often erroneously estimated, a method is pointed out of ascertaining it with ... for every practical purpose. He then enters into a detailed description of the several parts of an ... rapidly moving the objects, and bringing into view a succession of them, while the light remains the ... great stress is laid on the importance of a skilful management of the light. In stating the ...
Tópico(s): History and Developments in Astronomy
1833 - Royal Society | Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London
National Bureau of Economic Research (NBER)
A. 392 War Office: Reports, Memoranda and Papers (O and A Series). Notes on St. Helena by General Officer Commanding, South Africa, after Inspection Dec. ...
0000 - Gale Group | NCCO EuropeAfrica