Abstract
PARIS.Academy of Sciences, August 17.—M. Duchartre in the chair.—On a new blow-pipe, by M. Paquelin.—On “cyclic systems,” by M. A. Ribaucour.—New researches on the solar atmosphere, by M. H. Deslandres. (See Our Astronomical Column.)—On the enormous velocity of a solar prominence observed on June 17, 1891, by M. Jules Fényi. M. Trouvelot has previously recorded a remarkable luminous outburst that occurred on the sun on June 17. The position-angle of the group of prominences observed by M. Fényi was about 282°. At one time the velocity of one portion of the group reached the high value of about 850 kilometres per second. And another portion was elevated through about 72′ 2″in 210 seconds—the mean velocity being at least 485 kilometres per second. It is therefore concluded from the observations that matter can be projected from the sun into space with a velocity sufficient to prevent its falling back again.—Mechanical determination of the series of atoms of carbon in organic compounds, by M. G. Hinrichs.—On the arterial system of Isopods, by M. A. Schneider.—On the growth of the shell of Helix aspersa, by M. Moynier de Villepoix.
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