In addition to softening the steel, annealing benefits the metal by relieving strains in the piece.  Should a particularly accurate job be called for, the steel should be annealed again after the roughing cuts have been taken and before machining to the final size.  This will insure a true job and diminishes the danger of spring in the final hardening.  —­Contributed by Donald A. Hampson, Middletown, N. Y.

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[Illustration:  The above photograph was made by first printing a maple leaf of the paper, not too dark, then printing on top the picture from the negative, and finishing in the usual way.]

** How to Make a Post Card Holder [363]

This holder is designed to lay flat on the counter or to stack one on top of the other, keeping each variety of cards separate, or a number of them can be fastened on any upright surface to display either horizontal or vertical cards.

The holders can be made from sheet tin, zinc, brass or aluminum.  The dimensions for the right size are given in Fig. 1; the dotted line showing where the bends are made.  The

[Illustration:  Pattern for Cutting the Metal]

completed holder is shown in Fig. 2 as fastened to a wall.  —­Contributed by John F. Williamson, Daytona, Fla.

** Unused Paint [363]

Do not allow paint that is left over from a job to stand uncovered.  The can should be tightly sealed and the paint will be found suitable for use for several days.

** Perfume-Making Outfit [363]

The real perfume from the flowers is not always contained in the liquid purchased for perfume.  The most expensive perfume can be made at home for less than 10 cents an ounce.  The outfit necessary is a large bottle or glass jar with a smaller bottle to fit snugly into the open mouth of the large one.  Secure a small piece of very fine sponge and wash it clean to thoroughly remove all grit and sand.

[Illustration:  Bottle with Flowers]

Saturate the sponge with pure olive oil, do not use strong oil, and place it inside of the smaller bottle.

Fill the large bottle or jar with flowers, such as roses, carnations, pansies, honeysuckles or any flower having a strong and sweet odor.  Place the small bottle containing the sponge upside down in the large one, as shown in the illustration.

The bottle is now placed in the sun and kept there for a day and then the flowers are removed and fresh ones put in.  Change the flowers each day as long as they bloom.  Remove the sponge and squeeze out the oil.  For each drop of oil add 2 oz. of grain alcohol.  If stronger perfume is desired add only 1 oz. alcohol to each drop of oil.

** Home-Made Duplicator for Box Cameras [363]

The projecting tube of the lens on a hand camera can be easily fitted with a duplicator while the box camera with its lens set on the inside and nothing but a hole in the box does not have such advantages.  A small piece of heavy cardboard can be made to produce the same results on a box camera as a first-class duplicator applied to a hand camera.