30A
ANALYTICAL
CHEMISTRY
PRECISION FREAS
OVENS
The " s t a n d a r d of e x c e l l e n c e " in fine constant t e m p e r a t u r e e q u i p m e n t .
5 Year Guarantee. | The manufacturer's certificate goes w i t h | every Freas oven. It guarantees the oven against defects in materials and workmanship for five years.
• Fïve-Year Guarantee, for heating unit and thermostat • Hydraulic Thermostat, sensitive to %°C. • Finger-Tip Temperature Control • Nickel-Chromium Heater Bank • Ail-Metal Welded Cabinets • Glass Wool Insulation, 3 " thick, in doors and walls • Stainless Steel Interiors, Rustproof Iron Exteriors
Mechanical Convection models, for greatest efficiency: Forced air circulation provides uniform heat throughout the ovenj quickly and surely. Heat transfer is accelerated, drying time is reduced, oven loading capacity is increased. Air velocity adjustable between 75 and 250 feet per minute.
ALL-STEEL GUARD Modern research requires higher speed centrifuge equipment. Higher speeds necessitate stronger construction for greater protection. The "All-Steel" guard bowl supplied on the "Reinforced" Size 1, Type SB and "Reinforced" Size 2 Centrifuges insures full protection under all operating conditions.
Gravity convection models, for general use: Designed to take every advantage of temperature differentials to speed heat transfer. Ideal for all applications not requiring the advantages of mechanical convection, or where space is at a premium. Precision—Freas Ovens are available in a variety of sizes and in - two temperature ranges. They are furnished with adjustable shelves, 0-300° C. thermometer. Neon pilot lamp, and for 115 or 230 volts, A.C. or D.C. current. One popular size has a heating chamber 13" wide, 14" deep, and 13" high, and is priced as follows: 7 6 1 0 - G r a v i t y Convection, 35-180° C $170.00 7 6 1 4 - G r a v i t y Convection, 35-260° C 200.00 7618-Mechanicctl Convection, 35-180° C... 365.00 7621—Mechanical Convection, 35-260° C... 405.CO 7609—Floor stand, 3 3 " high, with shelf 25.00 full
Information
on These and Other Upon Request
Models
SCHAAR & COMPANY Complete Laboratory Equipment 7 4 8 W . LEXINGTON STREET CHICAGO 7
As the name implies, the All-Steel guard is fabricated entirely of heavy boiler plate steel with all seams heavily welded. When you order your next Size 1, Type SB or Size 2 Centrifuge, specify the Reinforced Model with the "All-Steel" boiler plate guard.
INTERNATIONAL EQUIPMENT CO. 352 W e s t e r n A v e . Makers
of Fine
Boston, Mass. Centrifuge
