NEW PRODUCTS •Pat. App'd. for
usually be sufficient, but the company adds that when special work with carbon-14 has been performed a sample should be mailed promptly thereafter. P-27
KURDES
r^W^
Paper Chromatography Drying Oven
Super-Speed
REFRIGERATED CENTRIFUGE TrV Fully automatic rotor acceleration Ά · Push button Electro-Dynamic Braking (smooth stopping) Ά· Accommodation for new continuous Model LRA
Shown set up for continuousflowoperation (Cover normally closed)
flow system* ~k Automatic unbalance Electrical Safety trip T*T Accommodates new 3 liter capacity
i j ! j ,
The model LRA is the first automatic refrigerated centrifuge of its kind. Like the nonautomatic Model LR. it has the newest and most efficient refrigeration design ever introduced. 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 fluws around large suiface 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 rotor. This system permits the cooling of any Louides' rotor from ambient to 0 C within ten minutes by spinning at slow speed. Rotor temperatures are easily maintained at 0' C and lower during full 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' electrodynamic push button braking system provides for smooth rotor stopping in a fraction of unbraked stop ping time. Λ 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 ! 2 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 beingdiscovered daily. Every Lourdes' instrument is guaranteed for a period of one year and this guarantee in sures customer satisfaction.
rotor (10,000 X G) T*T All Lourdes'
rotors
directly
inter
changeable TAT Unsurpassed refrigeration efficiency* • ^ Electric tachometer and synchronous timer "TAT Complete safety controls
Write for New General Catalog refer to
AC39
Catalog includes: • Refrigerated centrifuges* • Non-Refrigerated centrifuges • Automatic Centrifuges • Non Automatic centrifuges • Continuous flow centrifuges* • Multimixer—All purose homogenizer • Volumixer—Large capacity homogenizer
Sole distributor in Canada Canadian Laboratory Supplies Ltd. also Nationwide U.S.A. Dealerships
ESTABLISHED 1944
LOURDES Instrument Corp. BROOKLYN 32, NEW YORK
Circle Ne. 143 sn Readers' service Card 90 A
·
ANALYTICAL CHEMISTRY
Fuess Spectroscope Rapid chemical identification and analysis by direct, visual spectrochemical means are possible through use of its Fuess metal spectroscope, according to Applied Research Laboratories. The instrument is used for sorting alloy types of steel, cast iron, brass, nickel, aluminum, and magnesium. It can also be used for checking analytical specifications of finished products, ac cording to the company. APL says that less than 60 seconds are needed for a qualitative determination. It adds that, by using a photometer at tachment, a quantitative analysis can be completed in a minute or two with seven to 10 per cent accuracy. P-29
• Rotor and accessories
LARGEST MANUFACTURER OF SUPER-SPEED CENTRIFUGES.
53rd STREET & 1st AVENUE
A drying oven, the Model CD, for use in paper chromatography has been developed by New Brunswick Scientific Co. The oven heats to a preset tem perature of 110° C. in about 20 min utes, and three full-size sheets can be accommodated simultaneously. The unit is 3 3 y 2 inches high, 27 inches wide, and 14 inches deep, with a 7-inch depth of heating chamber. It can be placed on any laboratory bench equipped with a water aspirator, or it can be mounted on a wall. Insulated with glass wool, except for the door, the oven is designed for uni form drying action. A continuous in take of fresh air is heated and directed from bottom to top. Baffles at the bot tom of the chamber are arranged to conceal the heating elements and avoid danger of combustion from solvent droplets. The oven interior is lined with stainless steel. P-28
Recording
Spectrophotometer
Production of the SP.700 recording spectrophotometer is announced by Unicam Instruments, Ltd., a British firm. The instrument automatically records transmittance or absorbance on a linear wave-number scale between 54,000 cm."1 and 2800 cm.' 1 . Radia tion sources, a hydrogen lamp for ultra violet and a tungsten lamp for visible and near infrared, are mounted in a common housing and are interchanged by turning a knob. Gearbox control permits a quick reverse and five for ward scanning speeds from 250 cm."1
