𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Abrasives: Frank J. Katz (U. S. Geological Survey).—Emery and Corundum


Publisher
Elsevier Science
Year
1918
Tongue
English
Weight
66 KB
Volume
186
Category
Article
ISSN
0016-0032

No coin nor oath required. For personal study only.

✦ Synopsis


Nov.d918.]

CURRENT TOPICS. 647 lo~er non-conducting oxide, and closes the puncture holes, repairs .or reseals the film.

A number of such cells, depending on the voltage of the circuit, are piled up on top of each other with a spark-gap in series. The need of this spark-gap in series with the attester is the only still remaining undesirable feature which the oxide film arrester shares with the aluminum cell arrester, the multi-gap arrester, and other types.