powir-F
QUALITY
FOR SCIENTIFIC AND INDUSTRIAL RESEARCH
bERVALL
SUPERSPEED ANGLE CENTRIFUGE * 1 5 , 5 0 0 r p m ( 3 1 , 0 0 0 χ G) 4 0 0 m l Internationally known as "the work-horse of the modern research laboratory." Sealed Rotor. Portable — separate trans former for remote control. Operable in cold rooms, fume hoods, and under routine conditions. Write For Bulletin AC-31S M E D I U M ANGLE CENTRIFUGES Κ 5,000 rpm (3,500 x G ) | /
Type M: Twenty-Seven 15 ml tubes. Type SP: Six 75 ml tubes. Type SP/X: Ten 50 ml tubes and Five 15 ml tubes. Write For Bulletin AC-SIM Small Angle Centrifuges "A" and "XL" also available.
M i x all fluids at any speed with this mixer If y o u c o u l d h a v e o n l y one m i x e r i n y o u r l a b , y o u ' d be very safe in choosing this one. Y o u c a n m i x or stir any fluids w i t h it, u p t o 4 , 0 0 0 centipoises v i s c o s i t y . Y o u c a n m i x a t any speed f r o m 1 0 0 to 1,600 R P M , w i t h stepless speed c o n t r o l . A n d y o u can run the mixer 24 hours a d a y , s e v e n d a y s a w e e k if y o u n e e d t o .
T h e friction drive in this LIGHTNIN M o d e l F never needs oiling. At low speeds, it provides extra torque for mixing thick liquids. Drive and m o t o r are fully en closed, safe with inflammables. Y o u r choice of rugged bronze tank clamp o r ring-stand clamp for easy mounting; re movable 304 stainless steel or M o n e l shaft and propeller. Supplied for 110volt or for 2 20-volt 50/60-cycle 1-phase. Fully guaranteed. O r d e r from your laboratory supply house; or write us direct. Specify L I G H T NIN Model F Mixer $72.00 (For 110-volt AC. For 220-volt service, add $4.00.) Many other precision-builf LIGHTNINs for laboratory mixing. Electric or air driven units; single or variable speeds; explosion-proof mo tors; accessories. To get new illustrated Bulletin B-112, just check the reader service card, or write direct.
Lightnin MIXING
Mixers
EQUIPMENT
Co., Inc.
160-c M t . Read B l v d . , Rochester
Π,Ν.Υ.
In Canada: Greey Mixing Equipment, Ltd., 100 Miranda Ave., Toronto 10, Ont. Circle No. 83 A-1 on Readers' Service Card, page 75 A
LARGE ANGLE CENTRIFUGES 3,500 rpm (2,500 χ G) Compact, space-saving i n s t r u m e n t s . Maximum capacity: 2,000 ml. Rotors accommodate 500 ml, 250 ml bottles; 150 ml tubes. Write For Bulletin AC-31G DESIGNERS, MANUFACTURERS & DISTRIBUTORS OF "SERVALL" SPECIALIZED LABORATORY INSTRUMENTS
Ivan Sorvall, Inc. NORWALK
CONNECTICUT
The unequalled excellence of "Servall" Specialized Laboratory Instruments results from our original and continuing develop ment of design, and a thorough familiarity with researchers' requirements since 1930.
For further information, circle numbers 83 A-2, 83 A-3, 83 A-4 on Readers' Service Card, page 75 A
Parr
ADIABATIC CALORIMETER
Parr a d ia b a t i c oxygen Bomb calori meters are designed for highest precision in calorific measure ments, y e t p e r m i t rapid tests with min imum calculations. No heat radiation corrections requir ed. Has Parr selfsealing oxygen com bustion bomb, either s i n g l e v a l v e or double valve style. Ask your Parr dealer for complete details or write direct to the f a c t o r y for Spec. 1200.
PARR
INSTRUMENT COMPANY
MOLINE,
ILLINOIS
For further information, circle number 83 A-5 on Readers' Service carl, page 75 A VOL.
2 9 , N O . 3, MARCH 1 9 5 7
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83
A
