Product Capsules •Pat. App'd. for
Reagents. G. Frederick Smith Chemical Co., Inc. offers info on analytical reagents, specialty chemicals, and primary standards. 56A
GOURDE»-
Reagents. Eastern Chemical Corp. offers info on complete line of organic reagents. 88A
Super-Speed
REFRIGERATED CENTRIFUGE •jf Fully automatic rotor acceleration •fa Push button Electro-Dynamic Braking
H
Recorders. E. H. Sargent & Co. offers bulletin on multi-purpose recorder that measures current and voltage and all other quantities which can be transposed into potential or current signals.
(smooth stopping)
28A
Ά" Accommodation for new continuous Model IRA
Shown set up for continuous flow operation (Cover normally closed)
flow system* •fa Automatic unbalance Electrical Safety trip -fa Accommodates new 3 liter capacity
The model LRA is the first automatic refrig erated centrifuge of its kind. I ike the nonautuuiiitic Model LR. it has the newest and most efficient refrigeration design ever intro duced. By proper placement of cutouts, baffles and deflection plates, a smooth forced air cir culation system is set up. The warm air com ing off the rotor flows around large surface area cooling coils on the side and bottom of the chamber. Upon emergence in the cooled form, the air flows onto all portions of the rulor. This system permits the cooling of any Lourdes' rotor from ambient to 0 C within ten minutes by spinning at slow speed. Rotor temperatures are easily maintained at O'C and lower during lull speed extended runs, and as low as —15 C at lesser speeds or for shorter runs. By merely throwing a toggle switch, a 1 Hp. motor automatically accelerates any rotor to a pre-set speed. Lourdes' eleclrodynamic push button braking system provides tor smooth rotor stopping in a fraction of unbraked stopί ping time. A time delay relay releases the braking action at slow speed and permits the rotor to stop naturally without disturbing the sediment. This same centrifuge is now avail able with a Vi Hp. motor drive (Model LRA-1) to provide higher speed and force with the smaller rotors. Each centrifuge comes adapted to accom modate the new Lourdes' continuous flow sys tem at no additional cost. The continuous flow rotors with polyethylene liners, in addition to ease of operation, assembly and disassembly, also offer fast flow rate, high speed and force and greater collection capacity than any com parable continuous flow centrifuge. New time saving applications for these rotors are being discovered daily. * Every Lourdes' instrument is guaranteed for a period of one year and this guarantee in: sures customer satisfaction.
S
rotor (10,000 X G) •jç All Lourdes'
rotors
directly
inter-
•fc Unsurpassed refrigeration efficiency* •fc Electric tachometer and synchronous
ANALYTICAL CHEMISTRY
Refractometers. Circle 78A for info on new Phoenix Precision Instrument Co. differential refractometer. 78A
timer
Refrigerated Bath. Bulletin from Wilkens-Anderson Co. on refrigerated bath for controlled cooling and heating. - 1 0 ° C. to +65° C. 54A
•fr Complete safety controls
Write for New General Catalog refer to
AC59
Catalog includes: • Refrigerated centrifuges* • Non-Refrigerated centrifuges • Automatic Centrifuges • Non Automatic centrifuges
Sample Changers. Packard Instrument Co., Inc. offers bulletin on "AutoGamma" sample changer that provides completely automatic scintillation counting. 26A Scintillation Phosphors. Circle 49A-1 for 40-page book on scintillation phosphors. Circle 49A-2 for 36-page book on optical crystals. The Harshaw Chemical Co. 49A-1, 2
• Continuous flow centrifuges* • Rotor and accessories • Multimixer—All purose homogenizer • Volumixer—Large capacity homogenizer
Sole distributor in Canada Canadian Laboratory Supplies Ltd. also Nationwide U.S.A. Dealerships
BROOKLYN 32, NEW YORK
Circle No. 67 on Readers' Service Card
·
Refractometers. Bulletin on Phoenix Precision Instrument Co. automatic recording chromatographic refractometer. 75A
LOURDES Instrument Corp. 53rd STREET & 1st AVENUE
Refractometers. Bulletin on newPhoenix Precision Instrument Co. automatic process refractometer that provides end-point control through continuous stream analysis. 74A
changeable
LARGEST MANUFACTURER OF SUPER-SPEED CENTRIFUGES. ESTABLISHED 1944
118A
Reagents. Circle 62A-1 for info on polarographic reagents, 62A-2 for info on tetra-M-butykmmonium hydroxide, and 62A-3 for solution of sodium biphenyl. Southwestern Analytical Chemicals. 62A-T,2, 3
Spectrographs. Philips Electronics, Inc. offers information on portable x-ray spectrograph that provides element identity, alloy sorting, and plating thickness. 87A Spectrography Equipment. Bausch & Lomb Optical Co. offers info on its complete line of spectrography equipment and service. 63A Spectrometers. Circle 3A for catalog on single channel, automatic, and multichannel scintillation spectrometers from Baird-Atomic, Inc. 3A (Continued on page 120 A)
