Plants in action: a laboratory manual of plant physiology/ by Leonard Machlis and John G. Torrey. Illus. by Evan Gillespie. Machlis, Leonard. Torrey, John G., joint author. Plant physiology Laboratory manuals. QK711 .M16 581.1 MAP San Francisco: W. H. Freeman, c1956. c1956. 1956 Text 282 p.: eng A Series of biology texts