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Results of examination: The life preservers, the partially completed pontoon, | the Q7 packet and the K3 raincoat are all composed of the same , type of material, mainly rubber-coated cotton fabrics. The adhesive used on these items is a rubber adhesive different from the Rem-Weld glue of specimen Q22. Tne life preservers aré ail the yoke typos, that is with a hole for the head, placing flotation behind the head as well as in front of the body. Specimen K4 (Popular Mechanics, March 1962) contains an article discussing various types of life preservers. The article includes pictures of a man wearing a yoke type preserver similar in shape to Q3 through Q5, with the caption "Yoke-type vest holds swimmer high and upright; keeps unconscious man riding high, face out of water." The article states, however, that the yoke type preserver makes swimming difficult. Specimen K5 (Sports Illustrated, : May: 21, 1962) in discussing various inflatables, life preservers, toys, et cetera, states that "The composition of most inflatables.......is cither vinyl plastic or rubberized fabric. Rubberized fabric. is. durable and more difficult to puncture thaa vinyl." Specimen K6 (Popular Mechanics, November 1960) contains an article on making decoys out of inner tubes by a vulcanizing process. Neither the material nor the process was used in constructing Q3 through Q7. The life preservers were tested for their ability to retain air. They were inflated until firm, and then weights were placed on them. It was necessary first to seal three punctures in Q5. Specimen Q3 appeared to be completely airtight, remaining firm for several hours. Specimens Q4 and Q5 lost most cf their air im about an hour, However, the rate of deflation was slow, and pressure could no doubt be maintained by mouth. The hair on the dummy faces was verified as being of human origin, ' The dummy faces were examined for the preseyce of. bristles similar to those composing the K7 brush, but none were found. Pag e 2 PC-70654 GH (continued on next page)