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THE AUSTRALIAN PHOTOGRAPHIC JOURNAL.

July 20, 1896

pieces. Erect Nos., i and 2 into the hole, and to thoroughly steady them put a small screw-eye through ferrule into No. i, and secure all together with stays of strong cord. Get the smith to make two strong “ T ” shaped ferrules, so that the top portions fit on No. 2 so tighily that while they may be moved up and down with an effort they will not move of themselves. This is important. The other part of each ferrule must fit one end of sticks Nos. 3 and 4, which may with advantage be somewhat thinner than the other two, Place ferrules on No. 2 so that upper cross arm will be six inches from top, and the other one about a foot below this; insert ends of the other two sticks, twist them at right angles—or more—to each other, and the support for the lamps is complete.

Should any reader have a difficulty in making this apparatus for himself, no doubt it can be supplied by photographic stock dealers, with packing box complete, at moderate cost.

I will suppose five lamps are to be fitted, although, should a less number be sufficient for the purpose, the others may be cut off by drawing the rubber tubing from them and fitting the ends with small corks to prevent the escape of air when discharging the lamps. Whether “tobacco pipes” or the more highly finished and ornamental “ Flashlamps ” are used, the arrangement will be the same. First mark position of three lamps on upper arm, in the middle and near each end, but clear of the ferrule. On the lower arm the best places are near the outer end and about fifteen inches from upright. If pipes are used, they must be secured to the arms by means of rubber bands or fine binding wire, not too rigidly, but so that the tubing may be easily slipped on and off, yet firmly enough to prevent them “ turning turtle.” Should lamps be used, perhaps the easiest way to secure them is to have two stout wire spikes, soldered on each about ij inches long, and on either side. Holes to match bored through the arms will receive and hold them securely. These lamps must all be connected by small rubber tubing, similar to that used for discharging pneumatic shutters. In this manner make or obtain the following brass connecting tubes, of such thickness as to allowT rubber to be tightly stretched thereon. Their

several arms need not be more than an inch in length. Orre “ T ” piece, two “ Y ” shape, one “ F.” Secure these also loosely to the frame as follows: “ H ” to side of ferrule, holding the lower arm ; one “ Y ” on this arm between ferrule and first lamp; “F” to side of upper ferrule, and the other “Y” between first and second lamps on upper arm. Connect all these and lamps together with the rubber tubing, leaving some 15 feet hanging from the lower ferrule with which to discharge the lamps. The air supply may be produced by a large pneumatic ball, the lungs, or a pair of bellows. In the latter case a spiral spring must be fastened between the two handles to keep the bellows inflated and prevent them collapsing, and so firing off the charges before their time. They are easily acted upon by the foot when all is ready. Personally, I prefer “my own bellows” (lungs), and accordingly have the fifteen feet length of the larger gas tubing, the lower limit of its ferrule being made .of stouter brass to fit it tightly. In order to prevent any chance of this being dragged off the ferrule, it is well to tie a piece of string tightly round rubber, a few inches below ferrule, on stick No. 1, and loop it over the screw-eye in the same.

(To be Continued).

Contrast. Exposure and Development.

—Short exposure tends to emphasize contrast of light and shade, resulting in a hard negative.

Over, exposure tends to reduce contrast, and yields a soft or flat negative.

Quick development tends to reduce contrast.

Slow development tends to delicacy and detail, with longer scale of gradation.

Quick Development may be brought about by warming developer, concentration, or excess of alkali.

Slow development may be the result of a slow temperature, dilution, or very little alkali and excess of bromide..

The Eastman Photographic Materials

Co. —As a result of the operations of this enterprising and popular firm for the past year, the directors are in a position to issue a balance-sheet showing a net profit of ^10,914 15s. rod. This has been considerably contributed to by the great popularity of their “ Pocket Kodaks,” and other new cameras introduced. This satisfactory result proves that the enterprise of this firm is fully appreciated by the photographic world.

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Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 99,02 %.

La langue de reconnaissance de l'OCR est l'Anglais.

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