HEAT and STIR! for direct identification of organic compounds
new CENCO Hotplate Magnetic Stirrer
In m a n y laboratories where spectroscopy is a major function, Sadtler S t a n d a r d Infra-Red Spectra are considered t h e single most i m p o r t a n t reference available . . . Combines an electric hot plate and magnetic stirrer which operate independently or simultaneously. Variable speed stirring is powerful enough to stir beaker of pure glycerin. Heat control by ad justable thermostat. T o p plate 13A" of cast aluminum. No. 16632 for 115 volt oper ation, low priced a t . . $64.50
T h e y give the organic chemist and the spectroscopist a dependable source of comparison reference spectra. But just as important, they give the empiri cal formula, molecular formula, boiling o r melting point, source of reference c o m p o u n d , a n d similar useful information. A n d all Sadtler Spectra are indexed b y absorption bands in a v o l u m e called t h e S P E C - F I N D E R . This index makes it possible to locate a single u n k n o w n spectrum a m o n g t h e 15,000 spectra listed. A s k for D a t a File 305 for m o r e information. CHEMICAL
CENTRAL SCIENTIFIC C O . A Subsidiary of Cenco Instruments Corporation 1 7 0 8 Irving Park Road · Chicago 1 3 , Illinois Branches a n d W a r e h o u s e ! —Mountainside, N. i. Boston · Birmingham · Santa Clara · Los Angeles · Tulia Houston · Toronto · Montreal · Vancouver · Ottawa
CENCO
THE
CONSULTANTS
SADTLER
SINCE 1874
RESEARCH LABORATORIES
FIFTEEN SEVENTEEN VINE STREET
·
PHILADELPHIA 2, PENNSYLVANIA
Circle No. 33 on Readers' Service Card Circle No. 106 on Readers' Service Card
Π Ε & Η Ι Η Ε Ι Τ CONTROLLED
U E I
I
E
D
ELECTRONIC
LAB MIXER
new engtand nuclear
PROVIDES:
• CONSTANT TORQUE • VARIABLE PC SPEEDS FROM AC LINES
THYMIDINE-2-C"
Complete with attachment* F.O.B. La» V e g a » CATALOG
ON
$90
• Thyratron tubes on the Heller GT-21 controller sup ply demanded current by converting power in stepless variation to the direct cur rent motor. Assures con stant torque as mixes become either viscous or fluid. Vari able, reversible motor has direct and gear drive. Arma ture shaft speed, 0-5000 rpm. Gear shaft 18:1 ratio.Chuck, shafts, 3-step pulley included.
REQUEST
Order from your Laboratory Supply Dealer or write—
ηεω England nuclear corp.
GERALD K. HELLER CO.
575 A L B A N Y
1 8 1 9 I n d u s t r i a l Road
STREET
BOSTON
18, M A S S . L i b e r t y
Circle No. 72 on Readers' Service Card 104 A
·
ANALYTICAL
CHEMISTRY
Las V e g a s , N e v a d a
Circle No. 133 on Readers' Service Card
