March 6, 1944. Mine Safety Appliances Co., Braddock, Thomas & Meade Sts., Pittsburgh, Pa. Dear Sirs: Some months ago we purchased through the Barada & Page Company of Kansas City, Mo., one Industéial Gas Mask, Complete, Ed-6241, with canister for Chlorine protection. According to your instruetion sheet enclosed with this set you recommend the use of canister GML 16303 for Chlor- ine proteation. The one enclosed was GMO 346. Will you kindly inform us if the ounister enclosed is satisfactory for Chlorine protection? If not, may we ex- change it for the one you resomnend? Sincerely yours, 7 Director of Physical Rducation, Varsity Basketball Coach.