Variation of friction factor with Rey nolds number, and roughness is now reliably known for the whole range of numbers generally encountered In in dustry- Surprisingly, at higher Rey nolds numbers the friction (actor be comes a constant, independent of the Reynolds number and a function of the relative roughness only: 1m 1 ' [1.74 + 2 log tfky (8) Limits of applicability for this formula when applied to air at atmoipherlo pressure and temperature are given In Table I.

I \ facts you should know About the 1948 STEEL VALVE Outlook UN ANNUAL REPORT ,0 sun run users A vear before tbc war Btorted, stoel valves became difficult to obtain.

146 POWER BUYERS' GUIOE MID-YEAR. 1946 JEFFERSON UNIONS TYPES AND SIZES FOR EVERY NEED TO# (Knud 6nni t*ii . . an iriuilva fto(r* f oil ittiinti Ummu . . mum o p*tmentfitty light |o(itt vhUh (on Pa mIi up Uefcpraaf withavt wtdua pressure.

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cient, some dissolved, oxygen usually remain* and scavengers such as sodium sulphite, iron compounds and certain organic substances must be used to re move the last traces.

1 2Fifteen factory-built olr conditioning units, above, were selected ,to fit avoliobla arco and height In stock areas Coil connections to olr conditioning units, above, supp1 chilled water to -cool olr distributed through the st Department Stores Requirf Usual storo experience involves rearrangement of the sales PtirstCAL layout of a departn store is never constant.

13 Lb. rllLH W SWAIN, EDITOR NOVEMBER 1940 ESTABLISHED IN 1 B B Go See For Yourself Tf amt bmcinbehinc bditod needed to bo re* * toioded of the need to travel hit publisher would soon supply the necessary urge.

90f . / A "T -I Tim . \ / v*" Capacitor / \ current Shunt capodror _ Lood Mvct/re s/ current \/ \ i i VX--ii / y-loffrf pewer / \ 1 / \ current / ___ \--i ^Zeroonb \ / | $hunt copoeltor energized with motor when the line twitch Is closed.

We Have The Answers " TO TOUR pUMp*l pROBWtWS^ Iwr; i<rf lit Viking toUt and anglnaarlng ilglft ontvof qgtttiom on pumping for a long list of uHtfiod coitomert.

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-\\3- 992 CHAPTER 40 1947 Guide r quency is twice the lower frequency of the band as shown in the following table.

Di* juiHrd Cuinnany :> ) mi Abrasive Grain Association I9T6 Allegheny County Sanitary Authority * (916 Allegheny Ludlum Industries, Inc.

12 ,'Sth Xational Safety Congress, 1947 will be .the exposure.

Nwonffiftni on Plant of Tho Garlocx PaexlaK'Co,, isapni Mm Conor*!

F* I 4 Ittluatrial Hygiene Digest - 11 August, 19^9 055 Medical X-Ray Protection Up to Two Million Volta.