January 8, 1957 Dr. .

ACCOUNTING DEPARTMENT April 1, 1959 V\ Chairmen, Records Retention Committees Central Operations, Divisions and Associated Subsidiaries Gentlemen: Your copies of the final two sections of the Corporation Records Management Policy and Procedure Manual are being forwarded under separate cover for assignment to members of your Committee.

This advertisement appears in; California Plasterer, The Lather, Plastering Industries . * and Plasterer & Cement Mason--January, 1952 KOM/tM MPESTEEL?

LATH and PLASTER products merchandiser December 21, 1950 RUST PREVENTION AND CORRECTION ON SABINITE JOBS The occurence of rust spots in Sabinite, particularly when applied over metal lath, suggests the need for a few simple rules to follow in the prevention or correction of this condition.

j Asbestosis: a study of dose-response relationships i in an asbestos textile factory G.

READER SERVICE SECTION POWER NEWS.____ TECHNICAL BRIEFS_ _ _ _ _ PLANT EQUIPMENT NEWS.

foiTwater , ifcflfTfo 4 1 `miNeeds T^k hot procon ltmtodo loflyntr tor irtot* Ing mokiuo to high.

Push-button Muscle The tough little brute of a work-saver when you've got pipe to thread, cut or ream "400" Portable POWER-DRIVE It's light weight!

ADVERTISERS'INDEX nit hMki b Hnlw to mAth.

LONE STAR'S MODERN PIPE MILL by B.

Heaters, Unit Thermal Units Manufacturing Company Pershing Road and Loomis Street, Chicago, 111.

PLAINTIFF'S EXHIBIT April 25, 1958 Hr. 0 J. 73y, Ar of April 23, 1958 Grand Bapids BBSTHALL LIGHT ACOUSTICAL PIASTB A* H.

428 CHAPTER 19 1950 Guide Table 2.

608 CHAPTER 29 1950 Guide ture difference.

702 CHAPTER 33 1950 Guide the outdoor air inlet.