Document MJYDQ6Ko5w2LkJRQkLEryYkBV

-o r*# BOUBl RIRCRRFT COMPRRK /. GENERAL OFFICE SANTA MONICA, CALIFORNIA July 6, 1955 A850-GHP-L-116 Mr. Howard K. Nason Director of Research Monsanto Chemical Company 600 North Twelfth Boulevard St. Louis 1, Missouri Re: Pydraul F9 - Formulation Change Dear Howard: Somewhat belatedly there is returned herewith two copies of the official formulation change sheets executed by D. H. Moreton and me for Douglas Aircraft which incorporates Acryloid 710 as the viscosity index improver in Pydraul F9 in place of Santodex. Please excuse the delay. Best regards. GHP/jg Ends: DSW 620077 STLCOPCB4094104