NEW Electronic Controlled LAB MIXER
Provides variable speed at full DC torque from provides DC speed con trol from AC outlets. ACThyratron lines! tubes on controller supply de •
The H E L L E R
GT-21
manded current by con verting power in stepless variation to the direct current motor. Assures constant torque as mixes become vis cous. Variable, revers ible motor has direct and gear drive. Arma ture shaft speed, 0-5000 Complete with « ^ ^ ^ ^ rpm. Gear shaft, 18:1 ratio. Chuck, shafts, 3attachments * 2 9 U step pully furnished. F.O.B. Las Vegas ^ ^ ^ ^ Order from your
Laboratory
Supply
Dealer
GERALD K. HELLER CO. 1819 Industrial Rd., Las Vegas, Nev.
For further information, circle number 92 A-1 on Readers' Service Card, page 97 A
Best for QUALITY CONTROL and RESEARCH ANALYSIS
Ebert
3.4 METER CONVERTIBLE
Highest dispersion and resolution of any spectrograph!
SPECTROGRAPH The JAco Ebert offers highest resolu tion and dispersion, assures unsurpassed precision and sensitivity for analyses of ordinary materials as well as superalloys, rare earths and transuranic ma terials. Only the JAco Ebert embodies every desired feature for fast, reliable results plus simplicity of operation never before attained in so versatile a spec trograph. Normal peak analytical limits are easily extended through use of op tional Order Sorter. Learn more about the JAco Ebert — write today for free 8-page catalog.
Flexible: High dispersion for routine analyses . . . ultra-nigh dispersion and resolution for checking line interfer ence, line shape, self-reversal; for isotopic analyses. Simple: Easily operated by non-tech nical personnel. Stigma tie: Greater reliability, ver satility . . . eliminates critical adjustments. Wide Coverage: W i t h 20" camera, single exposure records — at high dis persion — the most sensitive lines of all metallic elements (except alkalies).
J a r r e l l - A s h Company 32 Farwell Street, Newtonville, Massachusetts
San Mateo, Calif. Tinley Park, I I I . New York, Ν. Υ. Dallas. Texas Pittsburgh, Penna. Atlanta, G a . For further Information, circle number 92 A-2 on Readers' Service Card, page 97 A
92 A
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ANALYTICAL CHEMISTRY
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