Document OLp549V9bMZgpm60bGjZD0Xw

j ~'3, iSPH^ Jf^ff C-CJ1/-7 7 PLAINTIFF'S EXHIBIT DUP-841 NIX6SAIDQI arch 19, 1974 TO * Austin Givens, K.O. lUdlctl Supervisor Antioch Plant FSOMs Charles P. kaihhardt, K.S. Cantral Research Department Haskell Laboratory About five or six yaars ago, Haskell Laboratory svaluatad several types of pulnoctary function equipment and found tha Jonas Pulaonor to ba a satisfactory, economical and port able device for aaasuring tha coanon ps raaatars of pulmonary function of interest in an industrial work force. The units evaluated included a McKesson Vitalor, the Oodart Pulaonet, Mad" Science Electronics wedge and office spIrenetars and a Collins respiraaeter. The Oodart and Collins spiraeatars are wet types while the others are dry. Since this evalaation was aada a amber of years ago, there nay now be other suitable spiraeatars on the aarket. Toe nay be interested to knew that the Chaehers Works has used a Pulaonor for several yaars and, as far as Z know, have found it quite acceptable. Toe night call fir. Heeld there and get his . first hand opinion on it. Please let ae know if we can be of further help on this natter. CFSt/bjd DUP 1141590 DU 059072