The Aerial Propeller is Driven by a Small Battery Motor Placed in the Boat
Lantern-Slide Binding Machine
The machine shown in the illustration is very simple to make and when complete is one of the greatest time savers that a photographer can possess. The base is made of a piece of board, 9 in. long, 2 in. wide, and 7/8 in. thick. The uprights support a small bar upon which the roll of binding revolves. An old ink bottle filled with water and with some cotton stuffed in the neck serves as a moistener for the binding. The use of this machine insures a neat job in a very short space of time. The slide is always in the center of the binding. The end of the slide should run a little over the end of the base so that the binding may be fixed to the edge with the fingers, using a downward motion. The slide is then turned over on the other edge with a rolling motion and the operation repeated.—Contributed by Alvin G. Steier, Union Hill, N. Y.
A Machine That will Help to Bind Lantern Slides Quickly and Neatly
Adjustable Film-Developing Machine
The simple homemade developing machine, shown in the illustration, can be easily made with three film spools, some strong wire, and odd pieces of wood. It consists of an open frame, having two side pieces provided with slots down the center, sufficiently wide to allow an ordinary wood screw, of suitable size, to slide up or down freely. The two end-connecting pieces act as supports for the developing tray and should be made of sufficient length so the tray can pass freely between the sliding upright frame, made to fit in between the side pieces of the base. This frame can be adjusted to suit the length of film and is clamped in place at the desired position by wood screws, fitting in the long notches and screwed into the uprights. The two bottom rollers consist of film spools which are fastened in place by being slipped over a suitable wire, bent so the spool can enter the developing tray and the wire pass over the sides. Another bend at the outer end provides for the adjustment of the spools and for securing the wire in place by staples. The top spool is secured to a wire fitted with a crank at the outer end, so that in turning the wire, the spool will also turn, thereby driving the film. When placing the film on the machine, the sensitive side should face outward so it will not rub against the spools. The ends of the film may be connected with pins or ordinary paper fasteners.—Contributed by H. R. F. Richardson, Ottawa, Ont.
Developing a Roll Film in a Tray with a Machine That Drives the Film around Rollers and through the Developing Liquid by Turning a Crank