Vol. 7 is in 2 books: bk. 1, title 26, chapter I, pts. 1-137; bk. 2, title 26, chapter I, pts. 140-459, chapter II-III. Vol. 14 is in 2 bks.: bk.1, title 49, pts. 1-91 ; bk. 2, title 49, pts. 101-203, title 50. "Codified as of June 1, 1938 ... should be used in conjunction with the annual supplements to the Code and in conjunction with the daily issues of the Federal register"--Pref.
Special Numbering
Some vols. called supplement & cumulative supplement.