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Article SCIENTIFIC INTELLIGENCE. ← Page 4 of 5 →
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Scientific Intelligence.
hands of Mr . Hatchet . The conclusion was , that it had no right to be classed as a distinft genus , being nothing more than a decomposed granite . An interesting memoir on this subject , of considerable length , was latel y read in the Royal Society , and no doubt will be g iven in the first publication of their transactions . Ma . DAY , of Leicester-place , a gentleman of considerable
knowledge in mineralogy , has determined , with considerable accuracy , the various forms which the acid of tin assumes in crystallizing . We should observe that it has only been lately discovered , by the analysis made by Guyton de Morveaux , that the various crystals , known by the name of tin ores , are the acid of tin . The results of Mr . Day's most patient attention are extremely curious . Forms that heretofore
seemed the effect of mere confusion are now determined , and classed under the radicals of which they are modifications . The greater part of them were not even known to the celebrated crystellograph , De Lisle .
ASTRONOMY . CITIZEN MESSIER , astronomer of the national institute , about seven in the evening on the 12 th of April , discovered from his observatory , a new comet in the bull , near the Pleiades , and in the parallel of the principal star of that constellation , with which it was compared at 8 h . 5 8 min . 16 sec . of true time . Its right ascension being 49 h . 19 m . 47 sec . and its declination zjh . zzmin . 55560 . North , Next
morning , the 24 th , the comet was compared again with the same star , at S h . 25 min . 4 6 sec . Its ri g ht ascension was found to be 50 h . 5 zmin . 55 sec . and its declination 25 h . 18 min . 5 S feet . This comet , which is small ,, round , and brilliant , has no tail , and cannot be seen by the naked eye . On the 25 th , its light was encreased , which seems to shew that it is approaching the earth .
This is the 20 th comet which Citizen Messier has discovered since 1758 , and the 39 th which I have observed . The number of the comets known now amounts to 88 , according to the catalogue which is in my astronomy . LALANDE . DR . BURCKARD , an able astronomer of Gotha , now at Paris , has been busily employed in calculating the orbit of the comet lately
discovered by Citizen Messier . He finds that it passed its perihelion on the 4 th of April , at 7 hours , in 3 signs , iz deg . 5 6 min , at the distance of o 4 . 8 7 from the sun ; the inclination of its orbit is 45 deg , 18 min . and it intersects the ecliptic at 4 signs , o deg . 44 min . ' WEIGHTS AND MEASURES . SIR George Evelyn Shuckburgh has lately laid before the Royal
Society the result of many years application and study upon the subject of an universal standard for wei ghts and measures . He proceeds upon the principles of the late ingenious Mr . Whithurst , and uses the identical instruments he employed . The mean measure is derived from the difference in length of two pendulums striking a different number of strokes in a minute .
Note: This text has been automatically extracted via Optical Character Recognition (OCR) software.
Scientific Intelligence.
hands of Mr . Hatchet . The conclusion was , that it had no right to be classed as a distinft genus , being nothing more than a decomposed granite . An interesting memoir on this subject , of considerable length , was latel y read in the Royal Society , and no doubt will be g iven in the first publication of their transactions . Ma . DAY , of Leicester-place , a gentleman of considerable
knowledge in mineralogy , has determined , with considerable accuracy , the various forms which the acid of tin assumes in crystallizing . We should observe that it has only been lately discovered , by the analysis made by Guyton de Morveaux , that the various crystals , known by the name of tin ores , are the acid of tin . The results of Mr . Day's most patient attention are extremely curious . Forms that heretofore
seemed the effect of mere confusion are now determined , and classed under the radicals of which they are modifications . The greater part of them were not even known to the celebrated crystellograph , De Lisle .
ASTRONOMY . CITIZEN MESSIER , astronomer of the national institute , about seven in the evening on the 12 th of April , discovered from his observatory , a new comet in the bull , near the Pleiades , and in the parallel of the principal star of that constellation , with which it was compared at 8 h . 5 8 min . 16 sec . of true time . Its right ascension being 49 h . 19 m . 47 sec . and its declination zjh . zzmin . 55560 . North , Next
morning , the 24 th , the comet was compared again with the same star , at S h . 25 min . 4 6 sec . Its ri g ht ascension was found to be 50 h . 5 zmin . 55 sec . and its declination 25 h . 18 min . 5 S feet . This comet , which is small ,, round , and brilliant , has no tail , and cannot be seen by the naked eye . On the 25 th , its light was encreased , which seems to shew that it is approaching the earth .
This is the 20 th comet which Citizen Messier has discovered since 1758 , and the 39 th which I have observed . The number of the comets known now amounts to 88 , according to the catalogue which is in my astronomy . LALANDE . DR . BURCKARD , an able astronomer of Gotha , now at Paris , has been busily employed in calculating the orbit of the comet lately
discovered by Citizen Messier . He finds that it passed its perihelion on the 4 th of April , at 7 hours , in 3 signs , iz deg . 5 6 min , at the distance of o 4 . 8 7 from the sun ; the inclination of its orbit is 45 deg , 18 min . and it intersects the ecliptic at 4 signs , o deg . 44 min . ' WEIGHTS AND MEASURES . SIR George Evelyn Shuckburgh has lately laid before the Royal
Society the result of many years application and study upon the subject of an universal standard for wei ghts and measures . He proceeds upon the principles of the late ingenious Mr . Whithurst , and uses the identical instruments he employed . The mean measure is derived from the difference in length of two pendulums striking a different number of strokes in a minute .