Howe, Ernest, 1875-1932, ed. Periodical Room *5164.1 The American journal of science ... 1819-1940. (Card 3)
Mar. 1933-July 1935).—Aug. 1935- R. S. Lull. Vol. 50 is a general index to v. 1-49. Beginning with the second series every tenth volume includes an
index which covers the preceding 10 vols. 5th series, vol. 36, whole no. 236, for July to Dec. 1938 is the last volume having the new series number. Beginning with vol. 237, Jan. 1939, the whole number alone is given. Vol. 236 includes an indgx to v. 231-236, 1936-38. (Continued on next card)