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New patented helium Dewars last ΙΟ times longer. "Glass vessels or other glass articles are rendered highly resistant to helium permeation by treating one of the surfaces thereof with cesium." That's the abstract of U.S. Patent 3,395,997. And it's the basis for our exclusive new line of Heli-Dewar® flasks. Translated, it means that Kontes/ Martin Heli-Dewars® have a working
life span of more than 10 times that of ordinary glass helium Dewars. This process now extends the use of more flexible and economical glass systems to many applications which had been confined to expensive metal fabrications. And the need for costly repumping and replace ment is minimized. This is the kind of improvement
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you've come to expect from people who are pioneers in glass cryogenic equipment. The kind of quality you get in ourcustom metalizing, graded glass-to-metal sealing, quartz view ing windows and complete quartz fabrications. For more information, write for our new catalog, KM-10 or call your Kontes salesman.
