MOVING PICTURES OF NORTHERN LIGHTS.

Oamaru Mail, Volume XVIII, Issue 12070, 25 October 1913, Page 3 (Supplement)

MOVING PICTURES OF NORTHERN LIGHTS.

A recent Swedish expedition, to studs. the- aurora iii''northern"l'a'tilidos'haS'.Sjti!ceeded ' iii obtaining' Three satisfactory moving-picturo firms of "thiV elusive,' colestial phenomonou.: The■kirietiinixigraph was first tried in 1910 oft'the aurora, but no satisfactory results-'ivorO obtained until this year: Says Nature (London), in a brief notice of tho expedition : "As in 1910. a kinematograph was emploved to try to secure the changing ;• phases of the aurora.; for tho most part ■'■ y the auroral images were too faint. " O.ti';'. ; threo occasions, however, when the '■ aurora? wrru very bright, consecutive, exposures were giv en. lasting from 0;5 second to 1 second for each image.' Another series of about 100 photographs, was taken on April 8 with the kino-.. matograph, each exposure lasting about four seconds. The photographs demonstrate the great utility of this lnstTiij ment not onlv'in obtaining consecutive features of the displays.' but in securing ordinary : photographs at the two stations. The communication ."is. rtc-' eompanied bv two' most interesting . plates.; ... . 'One of these reprbchices "four portions Of the Inn em a four aph • stria- exposed on April's" at These speak for themselves ■ in indicating the valuable aid thekiriematogrnph" brings tri auroral; studies'. The'grad.ua-1 change in form and..density of the filaments is clearlv indicated.M Storinvr- states that the. results .of this -exiied it ion will be published-'in confider.ilde detail-in a sn'bseqiiont memoir, and the above brief summary'is sufficient to show that the memoir will ho ii. most valuable eontrilmtion to <'iir. knowledge of the aurora."