Abstracts of Bell System Technical Papers Not Appearing in this Journal (01 July 1925)

Rays , I V . Beta-Rays, V . Gamma - Rays , V I . Nuclear Structure and Radioactive mology , VIII . The Effects o f Radioactive Radiations upon Matter. The references to periodical literature are particularly detailed. Echo Suppressors for Long Distance Telephone Circuits. A. B. CLARK a n d R. C. MATHES.