598 CHAPTER 33 1948 Guide Fig. 1.

794 CHAPTER 43 1948 Guide saturating efficiency may be desirable, or even necessary, especially if the same volume of air is handled as in summer.

56 CHAPTER 3 1949'Guide Fig. 2.

354 CHAPTER 17 1949 Guide In the underfeed side-cleaning stokers the fuel is introduced at the front of the furnace to one or more retorts, and is advanced away from , the retort as combustion progresses, while finally the ash is disposed of at the sides.

664 CHAPTER 34 1949 Guide the control function only; an indicating controller, when fitted with a pointer, thermometer,, or gauge which indicates the controlled condition; a recording controller, when it is combined with a clock mechanism and chart which records the controlled condition.

802 1 CHAPTER 40 1949 Guide ' reduced the energy requirement to 90 per cent in long radios elbows and to 74 per cent in short radius turns.

860 CHAPTER 43 1949 Guide upper: one closes the lower, one opens; selecting between them, air in the required quantity from either the warmer chamber A or the cooler one B.

Testing Laboratory United States Testing Company, Inc.

C-O N riDENTl A-L Mellon Institute of Industrial Research UNIVERSITY- OF PITTSBURGH PLAINTIFF'S EXHIBIT IHF-326 PROGRESS REPORT for the week ended March 9, 1946 INDUSTRIAL HYGIENE ROUl'TATIOM Subjects under which report is to be indexed Industrial Fellowship No. 259-12 5 copies made: 1 - Mellon Institute 2 - Industrial Hygiene files The summary of the paper on "Appraising Exposures to Silica Dust" was prepared.

X Air System Equipment <* Blowers PROPELLAIR Div.

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Foreword THE Transaction* of the 29th Kstzonal Safety ConrtM and Exposition of the National Safety Council.

Industrial Hygiene Digest - 12 August, lQliO 951 The Physlologteal Response of Animals to Respiratory Exposure to the Vapora of Dlls opr Gpylamlne.

Ipdus trial Hygiene Digest - *jiO August, iqLci of the upper extremity.

f'UaTON SIISDAY C.LOliK JANtJAKN 2 V. !