๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Extract from the minutes of the stated meeting of the Board of Managers of the Franklin Institute, held May 1, 1834

โœ Scribed by Fr.R. Shunk


Book ID
114029574
Publisher
Elsevier Science
Year
1834
Tongue
English
Weight
58 KB
Volume
17
Category
Article
ISSN
0016-0032

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Stated meeting of The Franklin Institute
๐Ÿ“‚ Article ๐Ÿ“… 1969 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 159 KB

While developing and manufacturing large and high-powered vacuum tubes, the staff of Varian Associates, between 1956 and 1960, recognized the advantages of a new pumping scheme for obtaining and maintaining high vacuum. This pump, called the sputter-ion pump, makes use of the chemical reaction and g