NEW PRODUCTS Teflon and Stainless Steel Syringe Teflon and Stainless Steel Syringe is useful for the measurement and trans fer of exceedingly reactive chemicals and in any application where glass syringes create a problem. Hamilton Co, Whittier, Calif. 428
A dosimeter which will detect as little as 0.1 Roentgens is based on the thermolescence property of manga nese activated fluoride crystals which will " t r a p " electrons in the solid state lattice structure which have been dis placed from their normal positions from radiation. The amount of trap ping and, therefore, the amount of luminescence, is directly proportional to the amount of radiation. This de vice is sensitive to x-rays, gamma rays, and other nuclear emanations. Dosimeter units are in the form of flat plaques and needles. A "read-out" unit which measures the amount of accumulated radiation dose from 0.1 to 10 Κ Roentgens consists of a heater, a multiplier phototube with suitable optical and electronic cir cuitry, an amplifier, and an output in dicating meter. Metcom, Inc., 76 Lafayette St., Salem, Mass. 429
Lab-Crest NEEDLE VALVES* Fine flow control Need no grease Vacuums to 10- 6 mm Hg Straight-through & right-angle flow in
Erlenmeyer Flasks with Approximate Graduations White enamel graduations have been added to a new line of glass Erlenmeyer flasks. Flasks are available in 125-, 250-, 500-, and 1000-ml. sizes. Corning Glass Works, Corning, Ν. Υ. 430
2 sizes. Another labware specialty from
F FISCHER
•Glass with Teflon tip
& PORTER
COMPANY
GLASS PRODUCTS DIVISION 1 5 9 2 County L i n e R o a d , W a r m i n s t e r , P a . Circle No. 142 on Readers' Service Card VOL. 34, NO. 10, SEPTEMBER 1962 · 1 5 7 A
