A Better HighVacuumStopcockfro EasyAction
NEW! Rugged: 30 lbs. pressure ·
Plug! All Glass & Teflon
New easy action plug adds real fingertip ease to the high performance of the rugged Ace high vacuum stopcock. The new plug is interchangeable and can be ordered separately for original 8194 vacuum stopcock barrels. Ace high vacuum stopcock features smooth action semi-needle valve that permits fine adjustment of
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Usable with corrosive gases
opening. " 0 " ring makes positive closure against glass seat. Reference marks on body and handle aid repetitive setting. The stopcock barrel is made of heavy walled glass. It can be used with corrosive gases, will withstand at least 30 lbs. internal pressure. All glass construction permits annealing. Write Ace for sizes, prices!
Speed a n d Convenience f r o m Ace:
Threaded Glass/Nylon Adapters Offer Quick Vacuum Seal for thermometers, bleed tubes... Ace threaded glass/nylon bushing combinations offer a convenient fast method to achieve a quick vacuum seal on adapters, flasks and tubing. The nylon bushings tighten into the accurately internally threaded part to form an " 0 " ring compression seal with thermometer, bleed tube, etc. Offered in a wide range of sizes. Write Ace for complete information.
A C E
G L A S S INCORPORATED Vineland, New Jersey
Louisville, Ky.
Ludlow, Mass. Circle No. 11 on Readers' Service Card
30 A .
ANALYTICAL CHEMISTRY, VOL. 42, NO. 13, NOVEMBER 1970
