468: CHAPTER 23 1949 Guide-' when the boiler is steaming under pressure conditions which would prevent the return of condensate by. gravity-- .The typical connections for an auto; matic return trap are illustrated in Fig. 13. : Each heating unit in a vapor system, as in all two-pipe systems, is pro vided with a'graduated or modulating valve which permits the control of heat in the radiator by varying the opening of .the valve.

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Con y id k nti a i* Mellon Institute of Industrial Research PLAINTIFF'S EXHIBIT IHF-368 UNIVERSITY OF PITTSBURGH Received: r-r-* Approved Date PROGRESS REPORT fcr the week ended July 15, 1944 INDUSTRIAL EIGIIKE FOUNDATION Subjects under which report is to be indexed Industrial Fellowship No. 259-10 S copies made: 1 - Mellon Institute 2 - Industrial hygiene file Further progress was made on the Beaver Valley atmospheric study.

Confidential -WL , Mellon Institute of Industrial Research Untvkhsity of Pittsburgh PROGRESS REPORT for the___ weakended----- May-3-, 1941 AIR HYGIEKr.

352 CHAPTER 14 .

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V todustrlal Hygiene" Digest - 4l~ August, I9U9 $2,947' Changes In the Blood In Experimental Trinitrotoluene Poisoning.

^P^5T05/5 AND LUNG CANCER Table 2.

lorabtr 12, 1943 t, Udt J. ftlnrau, Onion Asbestos 4 Rnbber Co. 3 jp South SletvUu Ivtssa, Chicago, mi nolo.

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^MEMORANDUM:- TO: Dr.

The Saranac Laboratory FOR THE STUDY OF TUBERCULOSIS OF THE EDWARD L.

THE QtiAKI tKLY bULLtllN ' for METROPOLITAN NURSES Tolu*e 13, No. 3 July 1943 This new Industrial Exhibit was first shown at the American Industrial Physicians and Surgeons Annual Meeting, held at Detroit from April 2d to 8th, 1949.

i DHAFl .TRIP TO MDHTHEAL, ASBESTOS, THETFORD 1HHES, QUEBEC 10/16/-10/21/44 *' *4 To explore,, the high tubj ulosis mortality rate in fhetford Mines'; ethe.asbestoif regarding #rhealth gpogram in Thetford,Mines; ,u visit Group policyholders in Montreal__v ,, ------- -- <U^etu22rri,iMA., " *"* **.TWt Ju*.FeC**!

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