Document wgDDkN1pmBJjZNwpQkVryb8G4

November 30, 1936 Or. Prowls P* Heyroth University of Cincinnati The Kettering Laboratory College of ItodiilM--SdM Avams Cincinnati 19, Ohio Door Doctor Heyroth1 Thank' you for pour letter of November 38 receipt of the sample of Tho correct dulgutlon of this notarial Is Ppdraul 150, omitting tho "F' which has somehow eropt Into your designation of tho fluid* Our only produst with an F in tho title is fydrou F-9. " Sincerely, Slnor F. Wheeler Assistant Director Medical Department KYWtdh co Dr. Joseph P* Trecn DSW 162491 STLCOPCB4041062