. Photographic pastimes : a series of interesting experiments for amateurs for obtaining novel and curious effects with the aid of the camera. cally fastened to the candleby the aid of indiarubber bands or one has acquired sufficient experiencein glass-bending to be able to produce; it,the most convenient shape of tube is theone illustrated by No. 7 (fig. 10). Herethe plain end is bent twice, at first verti-cally to the plane of the tube, thenobliquely to its axis, so that a rmg; isformed, which may be covered with india-rubber and eventually supported by smallwedges, and which conse
. Photographic pastimes : a series of interesting experiments for amateurs for obtaining novel and curious effects with the aid of the camera. cally fastened to the candleby the aid of indiarubber bands or one has acquired sufficient experiencein glass-bending to be able to produce; it,the most convenient shape of tube is theone illustrated by No. 7 (fig. 10). Herethe plain end is bent twice, at first verti-cally to the plane of the tube, thenobliquely to its axis, so that a rmg; isformed, which may be covered with india-rubber and eventually supported by smallwedges, and which consequently can bealways fastened to the candle very firmlyand stripped off at will. Finally in (fig. 10), an instrument is sketched, inthe production of which the glass workhas been reduced to its simplest form,where the glass tube is bent at the top inorder to blow out the powder, and at thebottom in order to receive the requiredsupply of powder. This primitive instrument is, however, far less appropriate forthis purpose than the other spirally beqt 46 PHOTOGRAPHIC PASTIMES. tubes, or photospires/ as they are calledby M. A. complete apparatus for [flash-light photo- ^PICTURES BY MOONLIGHT. 47 graphy is illustrated; two illuminantsare used, which are practically alwayssufficient, especially if one possesses areflector, which of itself considerablyreduces the harsh effect of a singleilluminant. PICTURES BY MOONLIGHT. Owing to the exceeding sensitivenessof our modern gelatine plates, photo-graphs may also be taken by brightmoonlight. The exposure must of coursebe comparatively very long, since thephotographic value of the lunar radiationis to that of a dull winter day onlyas I : 6000. The lens may be left un-covered for about one hour, a slight over-exposure being of little at the time of the exposure the groundis covered with snow, the exposure maybe reduced to about 40 minutes, in con-sequence of the masses of light which thesnow reflects into the ca
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidphotographicpast00schn
