H. Lanning, Mount Wilson Observatory, and K. Horne and R. Gomer, California Institute of Technology, report: ``Following a suggestion by B. Margon that Lanning 10 (RA = 5h30m17s, DEC = +36d57m59s, equinox 1950.0) is a cataclysmic variable, we have obtained coudé spectroscopy and high-speed photometry at Mount Wilson during 1980 which show that the object is an eclipsing binary with period 0.3212534 days +/- 0.0000017 days, HJD = 2444557.94957 +/- 0.00015 and K(wd) = 200 +/- 20 km/s.''
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