"Foreword This supplement gives (a) additions and amendments proposed at the Mid-year meeting@ Tulsa@ Oklahoma@ May@ 1935@ and subsequently ratified by letter ballot; (b) stipulations on testing and marking of gages@ as adopted by the Institute's Correlating Committee on Gages and Gaging Practice; and (c) stipulations on the use of the letters ""A. P. I.""@ and on adjustment of complaints@ as adopted at Tulsa@ May@ 1935@ by the Institute's Central Committee on Standardization of Oilfield Equipment@ for inclusion in all A. P. I. specifications."