Philosophical Transactions, Giving Some Account of the Present Undertakings, Studies, and Labours of the Ingenious, in Many Considerable Parts of the WorldRoyal Society of London, 1820 |
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Página 14
... consequently , as 100 parts of olefiant gas require goo of oxygen , and 100 of hydrogen 50 , for their respective combustion , it might be concluded from the above experiments , supposing no foreign gases present , that the 100 of coal ...
... consequently , as 100 parts of olefiant gas require goo of oxygen , and 100 of hydrogen 50 , for their respective combustion , it might be concluded from the above experiments , supposing no foreign gases present , that the 100 of coal ...
Página 19
... consequently sustain great loss in illumi- nating power . The object in view was probably to get rid of the sulphuretted hydrogen ; but neither is this so to be attained . In examining coal gas , I have often been struck with the ...
... consequently sustain great loss in illumi- nating power . The object in view was probably to get rid of the sulphuretted hydrogen ; but neither is this so to be attained . In examining coal gas , I have often been struck with the ...
Página 41
... consequently that the effects ascribed to it have been greatly over - rated . By these experiments , the power has been proved to be greater , than my anticipations even made MDCCCXX . G it , and fully adequate to all the important ...
... consequently that the effects ascribed to it have been greatly over - rated . By these experiments , the power has been proved to be greater , than my anticipations even made MDCCCXX . G it , and fully adequate to all the important ...
Página 46
... consequently , the laws of double refrac- tion could neither be investigated nor verified , without having recourse to some artificial means of magnifying the quantity to be observed ; a thing easy enough in theory , but requiring , in ...
... consequently , the laws of double refrac- tion could neither be investigated nor verified , without having recourse to some artificial means of magnifying the quantity to be observed ; a thing easy enough in theory , but requiring , in ...
Página 55
... Consequently , in calculating on these data , the mean angle of refraction de- termined by the simultaneous use of both observations , ( their semi - difference being taken for the angle of incidence ) may be expected to differ from the ...
... Consequently , in calculating on these data , the mean angle of refraction de- termined by the simultaneous use of both observations , ( their semi - difference being taken for the angle of incidence ) may be expected to differ from the ...
Otras ediciones - Ver todo
Philosophical Transactions, Giving Some Account of the Present Undertakings ... Vista completa - 1837 |
Philosophical Transactions, Giving Some Account of the Present Undertakings ... Vista completa - 1845 |
Philosophical Transactions, Giving Some Account of the Present Undertakings ... Vista completa - 1723 |
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angles animal apophyllite apparatus appears Argand burner assurance axes axis Barom barometer Basire BAUER blue bones Capt carbonic chance chest chronometers Cloudy and hazy coal gas colour contingency corpus spongiosum crystals cubical inches decrements diameter double refraction dugong elastic equal examined experiments fluent Franz Bauer fungi glass greenish hydrogen interval joint lives light London lungs MDCCCXX mean red membrane METEOROLOGICAL JOURNAL milk tusks mode nearly nitrous acid observations olefiant gas oxide Pale yellow piezometer pink plate polarised portion pound present produced proportion purple quantity Rain this Month rates refraction rings Rochelle salt ships Six's skull snow Sombre substance sufficient sulphate of platinum surface SW 1 Cloudy Therm thermometer thickness THOMAS STAMFORD RAFFLES tints tion tourmaline Trans tube urethra violet virtual poles wedge yellow green
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Página 313 - From the numerous instances in which I have now witnessed the limit to acuteness of hearing, and from the distinct succession of steps that I might enumerate in the hearing of different friends, as the result of various trials that I have made among them, I am inclined to think, that at the limit of hearing, the interval of a single note between two sounds, may be sufficient to render the higher note inaudible, although the lower note is heard distinctly. The suddenness of the transition from perfect...
Página 313 - The suddenness of the transition," writes Wollaston, " from perfect hearing to total want of perception, occasions a degree of surprise which renders an experiment of this kind with a series of small pipes among several persons rather amusing. It is curious to observe the change of feeling manifested by various individuals of the party, in succession, as the sounds approach and pass the limits of their hearing. Those who enjoy a temporary triumph are often compelled, in their turn, to acknowledge...
Página 131 - ... the Mode of Formation of the Canal for containing the Spinal Marrow, and on the Form of the Fins (if they deserve that name) of the Proteosaurus, by Sir E.
Página 21 - ... of an inch diameter, under a pressure of a half inch column of water ; it was then inflamed, and regulated by means of a stop-cock, so as to produce a light equal to that of a wax candle burning with full brilliancy ; the relative intensity of the light of these flames was ascertained by a comparison of shadows.
Página 311 - ... of my own hearing, as well as of others of our acquaintance. By subsequent examination, we found that his sense of hearing terminated at a note four octaves above the middle E of the piano-forte. This note he seemed to hear rather imperfectly, but he could not hear the F next above it, although his hearing is in other respects as perfect, and his perception of musical pitch as correct as that of any ordinary ears.
Página 180 - The affection of the mother for its young is strongly marked ; and the Malays make frequent allusion to this animal as an example of maternal affection. When they succeed in taking a young one, they feel themselves certain of the mother, who follows it, and allows herself to be speared and taken almost without resistance.
Página 174 - According to the natives of Sumatra, the Dugong is never found on land, or in fresh water, but generally in the shallows of the sea, when the water is only two or three fathoms deep. " During our short possession of Singapore...
Página 314 - ... like the Grylli, whose powers appear to commence nearly where ours terminate, may have the faculty of hearing still sharper sounds which we do not know to exist, and that there may be other insects hearing nothing in common with us, but endowed with a power of exciting, and a sense...
Página 310 - ... tones suited to produce any musical effect terminate ; yet all persons but those whose organs are palpably defective, continue sensible of vibratory motion, until it becomes a mere tremor, which may be felt and even almost counted. On the contrary, if we turn our attention to the opposite extremity of the scale of audible sounds, and, with a series of pipes exceeding each other in sharpness, if we examine the effects of them successively upon the ears of any considerable number of persons, we...