EQUIPMENT.
Thermal Curtain Raised Genera S Eiecfrîc's new electronic devices designed to work at temoeratures from 9 0 0 ° to 1 5 0 0 ° F . A N O T H E R BREAKTHROUGH an the "ther-
T h e new NALGENE I H H 1 funnels are m a d e i n exactly 60° cones. N o t i c e the 58° inner ribbing that assures rapid filtration. T h e outer ribbing allows air release w h e n u s e d directly on a container. M o l d e d from linear POLYETHYLENE for higher tensile strength, greater rigidity, a n d h i g h temperature resistance, here is in fact
the first series of Plastic Funnels designed specifically for Analytical Chemistry At Laboratory
Supply Dealers
Catalog Number 1235 \m\ I.D. at top mm Stem length mm For paper dia mm Number in each c a s e . . . . Price each
35 50 55 36 26
The
Everywhere 55 60 90 36 .30
65 65 110 36 .35
NALGECO.,IDO. ROCHESTER 2.NEW YORK
75 75 125 36 .48
90 90 150 24 .62
100 100 185 24 .76
160 125 240 12 1.60
Less 1 0 % in case lots, less 1 5 % in assortments of 5 cases.
mal barrier," heretofore chief deterrent to advanced development o f guided missiles and supersonic aircraft is General Electric's claim for their new "red hot" electronic devices a n d circuits. (C&EN, Sept. 17, page 4 4 7 1 ) . Made of metals such as titanium or of as yet undisclosed ceramics, the n e w vacuum tubes, capacitors, resistors, arid related items can operate at temperatures ranging from 900° to 1500° F. Being for the most part smaller in size than many similar "low" temperature coixnterparts, GE's G. Guy Suits says these new devices make possible extensive weight reduction by eliminating bulky, power consuming equipment from missiles, and aircraft. And, these devices can operate for long periods of time while exposed to nuclear raclîàtion. Two important assemblies, a multivibrator and a cathode follower, used, in power reactor controls have been inside an Oak Ridge National Lab graphite reactor since June, 1956. So far GE scientists have logged over 1000 hours of testing where the devices have been subjected t o 90% of the maximum reactor radiation and to temperatures ranging up to 842° F. The assemblies were completely instrumented to measure tem-
Neville Coumarone-lndene Resins Have Improved Many Products—Yours Could Be One Of Them In the manufacture of many products from paints to rubber tires and floor tile to chewing gum, Neville resins have long proved their ability to help make better looking, longer wearing, more salable merchandise. Neville produces an extremely wide range, of coumaronei n d e n e r e s i n s under t l i e most exacting of specifications, and con-
ducts* broad and constant research on their mutually profitable use in many types of products. If y o u have an item which is conceivably applicable, we suggest you send for further information. Without obligation, our chemists "will work with yours i n developing the application and selecting the proper grade for the job. Write to us. N e v i l l e Chemical C o m p a n y Pittsburgh 2 5 , P a .
NEVILLE 4710
C&EK
SEPT. 2 4,
1956
Resins—Coumarone-lndene, Heat Reactive, Phenol Modified Coumaronelndene, Petroleum, Alkylated Phenol • Oils—Shingle Stain, Neutral, Plasticizing. Rubber Reclaiming · Solvents—2-50 W Hi-Flash, Wire Enamel Thinners.
This hot motor serving as a cigarette lighter for H . B. Carter, manager of GE's advanced engineering development, has operated successfully for 50 hours at a temperature o f 500° C.
Protect « . . d e c o r a t e . . . strengthen « .·. with
DELLULOSE ACETATE and CELLULOSE ACETATE BUTYRATE «..versatile fiim formers by Eastman
SAFEGUARDING
CABLE PERFORMA
oldest
protective coating applications for Eastman cellulose, acetate * is w i r e * 5 7 a n d c a b l e lacquer* Such lacquers provide c î n > X c e " w î waTêrproofxodr^ £~'/Λ tng aiong w i t h toughness a n d abrasion resistance. Lacquers m a d e with Γ Λ 2 Eastman cellulose acetate butyrate a r e also used i n this field* partfcu«L ;f l a r l y f o r t h e protection of ignition cables and other specialized wiring· γ):
W A T E R P R O O F I N G FIBER-Half-Second Butyrate (Eastman's lowviscosity cellulose acetate buty rate) is used to make fiber weaving ma terials water-repellent. The fiber stripping is passed through a hot melt: of HalfrSecond Butyrate/emerging with a clear coating which maintains^ ' its gloss and strength despite tne.damagirig effects o f repeated washings 7ahd.outdoor exposure: The coating also resists.scuffing and the attack^ .. of mild acids and alcohol.-. ν . £ .* ^^> - ". '*> lr .. * fWT '. . „* -^,( *V'\
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