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I % 0 MODERN PLANT SURVEY.............. . .

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IIOperation SUB-ZErI Provi Efficient and Economical Bird Steam Plant shows 11,400 BtupM kwh station output for all purposes Cross MCI ton of the Foiler fFheetar ilngto-dmm utam gentrator for the Frank IP.

More'* rattl economy In temperature control* Because Spence Temperature Regulators are designed to limit heater steam pressures to an adjustable maximum, the need for a separate' reducing valve is completely eliminated..

In the unique EVERLASTING Valve, the disc never leaves the seat, even when the valve is full open.

OFFICERS Pr~sidtnl Karl Schwartzwalder Flint, Mich.

TuTy 3. 1956 D r .

GORDON P.

JLeacl J.

UNIVERSITY OF CALIFORNIA IOS ALAMOS SCIENTIFIC LABORATORY {Cont r act W-7405-eng-36) P.

C.

April 1st, 1955 Captain C.

Ha r o l d G.