If you wish a convenient device for maintaining an even temperature of your developer in cold weather, make a box about five or six inches deep and of sufficient length and width so that your developing tray will set in the top. with lip of tray resting on edges of the box. Place an electric globe inside the box, running the cord through an opening in the side or end. An eight candle power globe will usually give enough heat to keep the solution at a temperature of 70 , if the box is made fairly tight, and in very cold weather a larger globe may be used and the light switched off if the developer warms up too much.

A very handy, transparent ruler to use in commercial work for outlining a piece of furniture, or other object on the negative, preparatory to blocking out a background, is made as follows: A strip of double strength glass an inch and a half wide and about fourteen inches long is cut from a large sheet of glass or cleaned negative, care being taken to have perfectly straight edges. The edges are ground just enough so that there will be no danger in handling. This may be done on a piece of emery paper, stone or brick. Glue a small square of cardboard at each end of the glass on one side, so it will set just a trifle above the surface of the negative when used as a ruler. On this cardboard may be glued a small square, cut from a wide rubber band, so the rule will not slip when placed on the negative.

This will be found very convenient for many purposes because of its transparency. Turn it upside down so it will be in contact with the print when used as a straight edge in trimming.

In wiring a skylight for a set of horizontal curtains, a very convenient method of fastening the wires is with piano tuning pins. In this way the wires may be kept absolutely tight at all times. The pins may be bought at a music store for about twenty-five or thirty cents a dozen. Buy a gimlet the same size as the tuning pins and make the holes in the side of the skylight frame for the pins to fit into. Run the wire through the hole in the tuning pin and give it a turn with a wrench or clock key to hold the wire around the pin. It may then be turned until the wire is as tight as is desired and any slack may be taken up at any time by a turn of the pin. The pins need only be used at one side of the skylight, the wire at the other side being fastened securely to a screweye or looped over a nail and twisted. You will be surprised at the ease with which curtains may be shifted on a good tight wire.

From An Artura Iris Print By C. M. Hayes & Co Detroit, Mich.

From An Artura Iris Print By C. M. Hayes & Co Detroit, Mich.

If paste is used in the studio for mounting prints, it may be kept for a long time without souring by adding six or eight drops of formaldehyde to the pint of paste.

March. Our Illustrations

During a recent visit to the studio of Mr. C. M. Hayes, the appropriateness of the slogan, "In Detroit life is worth living," was found to be particularly applicable to Detroit photographers as well as the city in general.

Being a Detroit photographer is worth while, at least Mr. Hayes has found it so during his eighteen years' experience as a business man of this city, and when we say "business man" we have let out the secret. Few photographers combine in so marked a degree the artistic ability and busines acumen as Mr. Hayes. We would say he is a business man first - an artist afterwards, and the balance is so good that one statement does not disparage the other. One is equally impressed with the taste displayed in the appointments of the Hayes studio, the beautiful and refined examples of work displayed and the business methods so apparent in the conduct of the business.

It is with a great deal of pleasure that we offer in our illustrations examples of work from the studio of Mr. Hayes.

Convention Dates

Intermountain - Salt Lake City, Utah, April 3, 4, 5, 6. Sec.-Treas., Leroy Kellog, 809 16th Street, Denver, Colo.

Wisconsin - Milwaukee, Wis., April 23, 24, 25. Sec, E. H. Harwood, Jr., 820 College Avenue, Appleton, Wis.

Iowa - Ottumwa, Ia., May 7, 8, 9, 10. Sec, H. E. Link, Cen-terville, Iowa.

Illinois - Rockford, Ill., May 14, 15, 16. Sec, R. H. Hostet-ler, 212 Madison Street, West, Ottawa, Ill.

Ohio-Michigan - Cedar Point. Ohio, August 6, 7, 8, 9. Sec, Geo. D. Smith, Oak Harbor, O.

Missouri - St. Louis. Mo.. September 2, 3, 4, 5. Sec, L. S. Kucker, Springfield, Mo.

Begin making your preparations to attend the National Convention now. You will find Philadelphia will have much of interest for you in that week of July. Make it your vacation week.

Convention Dates StudioLightMagazine1912 51

From An Artura Iris Print By C. M. Hayes & Co.

Detroit, Mich.

Copyighted 1912.

C. M. Hayes .& Co.

March The Only Condition StudioLightMagazine1912 53

We please your friends - let us please you. Our portraits combine the most pleasing characteristics of the subject with our high standard of quality and workmanship.

March. Bulletin: The Eastman School Of Professional Photography For 1912

Minneapolis, Minn..........March 6, 7, 8

Chicago, 111............March 13, 14. 15

Kansas City, Mo,.........March 19, 20, 21

St. Louis, Mo...........March 26, 27, 28

Memphis, Tenn. ..........April 2, 3, 4

Atlanta, Ga. . . .......April 9, 10, 11

New Orleans, La. ........ April 16, 17, 18

Dallas, Texas . . .........April 23, 24, 25

San Antonio, Texas........April 30, May 1, 2

Phoenix, Ariz............May 7, 8, 9

From An Artura Iris Print By W. M. Stephenson Atlanta, Ga.

From An Artura Iris Print By W. M. Stephenson Atlanta, Ga.