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Square D Incorporated at Elmhurst, Long Island, New York. This sub-contract was for the construction of model altitude controls am a.mounted to $7,446. Correspondence written during this period is as follows: Date of Corres- ponience Address 11/7/46 Plax Corp Hartford, Conn. Att: ¥~. Griffith 11/7/II:> Visking Corp. Chicago, Ill. Mr. Cahn 12/4/11:> Visking Corp. Chicago, Ill. E. B. C~ 12/10/II:> Dewey & Almy Chem. Co. Cambridge, Mass. Att: Mr. Langley W. Isom Abstract Answer Forwarding P.0.#5983 Not furnished. & Requesting price quotation and delivery schedule for 4 diff. thicknesses of 36" wide polyethylene sheet {.001 11 .00225 11 .004" stnd .008". Request to know what maximum width Poly- ethylene could be supplied in, and what the cost and delivery date would be. Advising interest in 72" circumference securing 300 ft. of 72" Polythylene tube circumference poly- could be furnished. ethylene tubiDg re- Request to know quest information on quantity and thick- thickness alld price. ness .002 mil thick $1.40/lb. estimate ani would need 19 lbs. Acknowledging receipt None required. of material used ~ Mr. Isom in his con- stant level balloon work. Also advising that order for single and double neck 1000 gram balloons had been placed. - 5 -