sample="quota" bates="1001604577" isource="pm" decade="1960" class="ni" date="19650305" April 5, 1965 Mr. James Gargus Hazleton Laboratories P.O. Box 30 Falls Church, Virginia Dear Jim: The enclosed sample should be applied at 60 mg tar per painting for five (5) of the runs. In addition, sample X6D5CY should be applied to the sixth set of mice at 44.5 mg tar per painting. I mention the word "tar" because the samples are made up at 50% concentration. Therefore, it will be necessary for you to determine the number of brush strokes necessary to deliver the specified amount of tar after the acetone has evaporated. The application I mentioned is, of course, the amount we shall apply after the acclimation. Sincerely, R. D. Carpenter /cb copy to Dr. Max Ben Dr. P. C. Luchsinger