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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... scale in the tints which many of them develope on exposure to a polarised ray . By J. F. W. HERSCHEL , Esq . F. R. S. Lond . and Edin . P. 45 V. A case of the human fœtus found in the ovarium , of the size it usually acquires at the end ...
... scale in the tints which many of them develope on exposure to a polarised ray . By J. F. W. HERSCHEL , Esq . F. R. S. Lond . and Edin . P. 45 V. A case of the human fœtus found in the ovarium , of the size it usually acquires at the end ...
Página 21
... scale sliding through the frame of support . I 2. Having filled this gasometer with pure olefiant gas , it was allowed to issue from a brass jet having a single perfo- ration of of an inch diameter , under a pressure of a half inch ...
... scale sliding through the frame of support . I 2. Having filled this gasometer with pure olefiant gas , it was allowed to issue from a brass jet having a single perfo- ration of of an inch diameter , under a pressure of a half inch ...
Página 45
... scale in the tints which many of them develope on exposure to a polarised ray . By J. F. W. HERSCHEL , Esq . F. R. S. Lond , and Edin . Read December 23 , 1819 . SINCE the period of the brilliant discovery of MALUS of the polarisation ...
... scale in the tints which many of them develope on exposure to a polarised ray . By J. F. W. HERSCHEL , Esq . F. R. S. Lond , and Edin . Read December 23 , 1819 . SINCE the period of the brilliant discovery of MALUS of the polarisation ...
Página 46
... scale of investigation . There are two methods which may be pursued in obser- vations on double refraction and polarisation , the one direct , the other indirect . The former turns on immediate observ- ations of the angular deviation of ...
... scale of investigation . There are two methods which may be pursued in obser- vations on double refraction and polarisation , the one direct , the other indirect . The former turns on immediate observ- ations of the angular deviation of ...
Página 47
... scale of measurement , with a possibility of applying it precisely to the object mea- sured , arising from the distinctness of all its parts . Another , no less precious , is the leading us by mere ocular inspection to the laws of very ...
... scale of measurement , with a possibility of applying it precisely to the object mea- sured , arising from the distinctness of all its parts . Another , no less precious , is the leading us by mere ocular inspection to the laws of very ...
Otras ediciones - Ver todo
Philosophical Transactions, Giving Some Account of the Present Undertakings ... Vista completa - 1845 |
Philosophical Transactions, Giving Some Account of the Present Undertakings ... Vista completa - 1723 |
Philosophical Transactions, Giving Some Account of the Present Undertakings ... Vista completa - 1855 |
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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...