You may have bought bonds, cut down on fuel and food, encouraged some of your help to enlist in the Army or Navy, contributed to the Red Cross and the Y. M. C. A. - you may even have sons, relatives and friends who are doing their all towards winning this war, and still you may be lacking in the one vital thing that, more than all else, may be the means of bringing victory to our fighting forces.

We will win the war, but the sooner we know what is required and the sooner we bend every effort to furnish the vital needs of our armies, just that soon can we say we are doing our bit. The longer the delay the greater will be the cost, not alone in dollars and cents, but in life and happiness.With billions in money our Government is unable to buy one of the vital necessities of modern warfare. With millions of men, ample food, clothing, guns and munitions, we are unable to equip one of the most important divisions of our army with the necessary material to intelligently and efficiently direct our guns and human fighting forces.

women with camera

The army must have lenses that cannot at the present time be made; that cannot be bought in the open market - slacker lenses that are in the front boards of photographers' cameras and must come out in the open and do their part towards hastening the winning of the war, as they surely will.

If the war is not actually won in the air, our forces can at least be most effectively directed from the air, and our losses will often be determined by the efficiency of this important branch of the service.Many people do not know that the most important work of the Aerial Forces of our allies is the securing of photographs of enemy lines, batteries, troop movements, etc., from which maps are made or altered daily, and by which information, weak spots are found, advances conducted or troops most advantageously stationed to repulse an enemy attack.

Aerial battles, as a rule, are the result of enemy interference with machines manned by photographers and cameras sent up daily to obtain such information. Each photographic outfit has its convoy of fast battle planes to fight off attacking machines, and also to prevent the enemy from securing photographic information.

The camera lens is truly the eye of the army, and our fleet of air planes must have this equipment. The Signal Corps of our army asks photographers to enlist their lenses for army service - to be fitted to cameras for the fleet of observation airplanes now being built. The need is immediate and of greatest importance.

England had to meet this same difficulty in the earlier stages of the war in the same way. She is now making lenses better than those formerly imported, but no faster than needed for her own use. Our Bureau of Standards is perfecting glass from which we will be able to make lenses of new and improved types, but not in time to equip airplanes already built or those soon to be ready for service.

The lenses most needed and which the Government is willing to buy are in your hands, and you should show no reluctance in selling them for such a cause - the protection of the lives of our loyal soldiers and the success of our armies in France.

Lenses are being made and thousands are for sale in Stock Houses throughout the country that do not meet the Government's special requirements but which you can use without being handicapped. Sell your lens to the Government and buy one of these.

The Signal Corps of the Army through its Photographic Division has been endeavoring, by various forms of publicity, to secure the necessary lenses for its work, but those most vitally needed are still in the possession of photographers throughout the country.Sell your lens to the Government now, and you will render it a great service. Don't wait for the other fellow - don't fear the loss of a job of work - don't measure your patriotism in dollars and cents, and don't stop when you have done your part. Call a meeting of the photographers in your town and urge them all to enlist their lenses as well.This plan has been adopted in some cities with wonderful results, and the Signal Corps will be glad to render all assistance possible in arranging such meetings. You are requested to give this help.

Do Your Bit Towards Winning This War StudioLightMagazine1918 3

FROM 1917 KODAK ADVERTISING CONTEST

By Wm. Shewell Ellis Philadelphia, Pa.

Take the initiative and be classed as one of the active workers in the movement to bring about the united and unselfish support of our fighting forces by every true American.

All makes of foreign lenses of a working aperture of F.S.5 and F.4.5, with focal lengths of 8 1/4 to 24 inches, are needed. The following are some of the makes wanted: Carl Zeiss Tessars, Bausch & Lomb Zeiss Tessars, Voigtlander Heliar, Euryplan, Cooke, Goerz, Moia, Bush, Ross, Ross-Zeiss, Krauss, Krauss-Zeiss, Steinheil-Isostigmar.You are requested to immediately notify the Photographic Division of the Signal Corps, U. S. A., 825 Mills Building Annex, Washington, D. C, of lenses of the description above which you are willing to sell and the price asked.

Enlist your lens in the U. S. Army and, by so doing, increase its efficiency in locating enemy guns and enabling our artilery to put them out of action.That it is your duty to lend this assistance should be enough to insure your prompt and unselfish action.Make the print on Arthura