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Magnctostriction and Magncttc Anisotropy Constanta ofMagneslum-Manganese Fcrritcs. V. U. Usatoy, V. P. Ryabinin, K. K. Burmaklna, and

R. P. Smólln.......................................... (E)    1245    1701

Cathodc Fali in Vacuu.n Ares with Dcposited    Cathodes. V. E. Grakov....... (E)    1248    1704

Switching Characteristics of a Three-Electrodc Spark Gap. G. A. Yorob^y

and G. S. Korshunoy..................................... (E)«    1251    1707

Statistical Siudy of Nanosccond Breakdown Delay in Narrow Gas Gaps in

Superhigh Electric Field*. G. A. Mesyats and Yu.    Bychkoy ......... (E)    1255    1712

Telescoplc Systems of Cyllndrlcal Lenses. Ł. d. Cllkman, V. M. Kęl^łmaa,

and E. M. Yakushey..................................... (E)    1261    1720

Helium Sorption by Layers of Condensed Gases. V. B. Yuferoy,

V. A. KovaIenko, and P. M. Kobzev........................... (E)    1265    1726

Use of the Dimensional and Similarity Methods in Investigating Pulse Diecharge

inWater. I. Z. Okun*.................................... (T/E)    1267    1729

BFIEF COMMUNICATIONS

Tuning ot a Nonlincar Crystal to Generate the Second Harmonie in a Focused

Beam. V. D. Volosov.................................... (E)    1274    1739

LETTERS TO THE EDITOR

Electrical Discharge through Laeer-Induced Spark. V. I. Vladimlrov,

G. M. Malyshęy, G. T. Razdobarin, and V. V. Semenby.............. (E)    1277    1742

Thermometric Method for Recording Boundaries in Ion-Mobility Analysis

of Electrolyte Solutions. B. P. Konstant ino v and O.    V.    Oshurkoya....... (E)    1280    1745

Available from Americaii Institute of Fbvsics

Vol 12, Ho. 9, Htroh 1968

226