C 0 P 1 Chicago, I llin o is J u ly 29, 19UI Mr. 0 . 3 . le w i s Dear Oscar, D e c e n tly th e Mine S a fe ty A p p lia n ces Company r e p r e se n ta tiv e was in to see us and l e f t th e attach ed l i t e r a t u r e r e g a r d in g t h e ir new Comfo M etal iume R e s p ir a to r He s t a t e d th a t t h i s r e s p ir a t o r c o u ld he worn beneath a w eld er' s helm et and th a t i t g iv e s p r o te c tio n a gain st a l l metal fumes, in clu d in g lea d fumes.

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/ LABORATORY OF AP P LIED P HYSIOLOGY UNIVERSITY OF CINCINNATI COLLEGE OF MEDICINE GENERAL HOSPITAL July 18, 19 Kr. 0.

June 1^, 1939 H r. 0.

<% NOMATCHES ,, genTEeTr EaAl EsTaHfYetLyLrEAuDl es NOMATCHES KEEP YOURMIND ONYOUR WORK GENERAL RULES 1.

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/ J er/ jt IN TER -OFFICE CO R R E S P ON D E N CC Et h y l Ga s o l i n e Co r p o r a t i o n Ch r y s l e r B u i l d i n g 135 Ea s t 4 2 P St r e e t "N e w 'Yo r k September 7, 1933.

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-v\ BUTLER COUNTY Co u r t .Ho u se Ha mil t on.

April 12, 1965 Professor Harry v, Warren Department of Geology Hie University of British Columbia Vancouver 8, Canada Dear Professor Warren: Please accept my thanks for your letter of March 10 and the material enclosed with it* I am hard pressed for time, especially at this end of the year, and we shall be short-handed until Dr.

,April 11 1946 Mr .

November 13, 1J44 Dr.