« السابقةمتابعة »
THE STATE OF SCIENCE.
Report on Observations of Luminous Meteors, 1861–62. By a
Committee, consisting of James GLASHER, F.R.S., F.R.A.S., Secretary to the British Meteorological Society, &c.; R. P. GREG, F.G.S. &c.; E. W. BRAYLEY, F.R.S. &c.; and A. HERSCHEL.
The Committee are indebted to Members of the Association and to other observers for a larger number of observations bearing upon individual meteors than has fallen to their lot to assemble during previous years. They may be counted as follows:-(A) Meteor 1, July 16th, eight accounts ; (B) meteor 2, July 16th, thirteen accounts; (C) meteor, August 6th, three accounts; (D) meteor, November 12th, eight accounts; (E) meteor, November 19th, eleven accounts; (F) meteor, December 8th, twenty-eight accounts; (G) meteor, February 2nd, 1862, eleven accounts; (H) meteor, February 23rd, 1862, five accounts. Of the small shooting-stars, double observations only are found. The discussion of these observations follow the Catalogue in Appendix I.
Eight accounts of one and thirteen of the second of the meteors visible on the evening of July 16th, 1861, show those of the Duke of Argyll and Mr. Frost to have been distinct meteors, succeeding each other with an interval of more than an hour. The accounts are embodied in the present Catalogue, and the results discussed in Appendix I.
Of the meteor August 6th, a further account from excellent observers in London, has afforded a good determination ; the accounts and their interpretation are presented in the Catalogue and Appendix I.
Numerous accurate observations of shooting-stars of the 10th August, period 1861, too voluminous for separate insertion in the Catalogue, have been collected and examined for accordances, and the accordant observations only entered in the Catalogue, together with individual observations which appeared of particular interest from among the entire number; the results of the accordant observations are tabulated in Appendix I.
1861. hm July 16 9 30 p.m. Weston - super - Large as Venus at Duller than 3 or 4 seconds; Exploded when W. Mare. (Also max.
Venus at moving altitude 45°. seen in Dor
max. bril. slowly. setshire.)
16 9 58 p.m. Whitehall, Lon- Very large ball, but very brilliant.. Slower than Began almost E. don. not quite full.
meteors and disappeared usually behind the move;
houses on the “leisurely." west side of
Whitehall. 16 Exactly 10 Gainford, Darl- Like Jupiter, seen..
Motion not From 10° belowa p.m. | ington, York in a good tele
rapid. Aquilæ, through shire. scope, but not
the E. to N.E. exactly spherical.
from altitude 30° to about altitude 20°.
16 ............... Greenwich and Kensington. Already inserted, p. 10 of Report for 1861
OF LUMINOUS METEORS.
Appearance; Train, if any, Length of and its Duration.
Direction; noting also
White train 8° in length ? .......... Appeared in the N.W...........
Personal ac attended the nucleus.
counts to W.) Burst into sparks which
II. Wood. continued 3 seconds, advancing 10° before
they disappeared. Carriéd a blunted or spread ............ Downwards at an angle Point of observation Charles Reed. tail 15 or 20 times longer
1 of 25° to the horizon. was facing the Nathan the head.
tional Gallery, near
Shortly before disappear- About 90°.. First horizontal, then.
..... Mrs. E. Addison. ing threw off a part of
declining slightly. | its substance, which
followed it closely like a lessér luminary till both were suddenly extin. guished in a sudden and peculiar manner in clear sky. A track of light endured for some se. conds at this part of the path.
.......... J. Howe; Duke Disappeared in mid-air, 60° ......... Horizontal, or very ............ .............. John Borough. like a Roman candle
slightly declining at ball ; but the train which
last. pursued it did not look
exactly like sparks. ** Majestic." Left a track ? .......... Came over from the Open bay-window faced Mrs. Davies. of light behind it, but
right of the house, N.N.E. no sparks till just before
descending as a rocket it disappeared, when one
in the form of an spark was cast off from
Leaving no train. Sailing ? ............ Quite horizontal ; from ....... ! without change until it|
left to right.
slightly inclined to-
..G. H. Chambers.
Roman candle-ball. Phos-l ? ..........
phorescent train, closely
adbering and sharply i terminated, without
Slightly declining; per- Point of observation H. H. Bemrose.
haps curved down. upon the sands mid.
way between Pen-