FORTHE FACTS
PROPIPETTE Safety Pipette Filler holds liquids indefinitely
on "C.P." clean glassware and laboratory ^ ^ ^
• Time Tested • No moving parts • Simple to operate
s e n d for The new PROPIPETTE eliminates the dangerous practice of using the mouth to draw liquids into pipettes. It is simply to use and the operator soon becomes proficient so that liquids can be delivered quickly, precisely and safely. Measurement precision is extremely high (0.01 cc). The instrument has three agate-ball valves which operate independently a n d the entire procedure can be done with only one hand.
"THIS IS
HAEMO-SOL A c o m p l e t e report plus technical data based o n three years of research o n Haemo-Sol, t h e cleanser specifically f o r m u l a t e d for precision laboratory glassware and apparatus, including metals, rubber a n d plastics.
comes in black, r e d , green and blue . . · PRICE $ 7 . 6 0 Available through laboratory dealers.
All laboratory pipettes can be used with the PROPIPETTE - Safety Pipette Filler
Write today for booklet and free samples.
MEINECKE & COMPANY, INC. Our 70th year of continuous service to the hospitals of America 229 VARICK
each
sent on approval
Wriie for additional
M
STREET, NEW Y O R K 1 4
information
i
INSTRUMENTATION
a
Distributors of Laboratory and Scientific Specialties 17 West 6 0 t h Street New York 2 3 , Ν. Υ.
ASSOCIATES
Circle No. 66 on Readers' Service Card
Complete vviffo attachments
HELLER
$
ELECTRONIC CONTROLLED
F.O.B. Lai Vegas
90
LAB MIXER
Pressure Reaction Apparatus PARR Series
4500
For bench-scale reac tions in 1 or 2 liter, stirrer-type bombs at pressures to 1000 psig. and tempera tures to 350° C.
• CONSTANT TORQUE
Τ·
STEPLESS^^^HI
D
VARIABLE DC SPEEDS FROM AC LINES
• Thyratron tubes on the Heller GT-21 controller supply demanded current by converting power in stepless variation to the direct current motor. Assures constant torque as mixes become either
viscous or fluid. Variable, reversi ble motor has direct and gear drive. Armature shaft speed, 0-5000 rpm. Gear shaft 18:1 ratio. Chuck, shafts, 3-step pulley included.
Provides internal stirrer, pressure gage, thermowell, safety rupture disk and convenient fittings for (a) introducing gas, (b) removing liquid samples, and (c) releasing gas without interrupting agitator or heater. Available in T316 stainless steel, also in seven other corrosion-resistant metals and alloys. In ternal cooling coils and glass liners can be supplied.
Order from your Laboratory Supply Dealer or write—
Ask for latest issue of Specification 4500
GERALD K. HELLER CO.
PARR INSTRUMENT C O M P A N Y
2673 South Western Street · U s Vegas, Nevada · P. O. Box 442C Circle No. 48 on Readers' Service Card
211 Fifty-Third St.
Moline, Illinois
Circle No. 73 on Readers' Service Card VOL.
3 4 , N O . 7 , JUNE 1 9 6 2
·
151 A
