]; Z. Untersuch. Lebensm. 74 (1937) 408–411.
92. Haag, H.B.: Chemical and pharmacologic observations on nicotine and tobacco smoke; The Merck Report (October, 1940) pp. 25–29.
93. Shmuk, A.A. and N. Piatnicki: Acids of tobacco. II; J. Assoc. Off. Agr. Chem. 69 (1930) 19–26, see Chem. Abstr. 25 (1931) 3124.
94. Wada, E. and Y. Kobashi: Chemical constituents of tobacco. IV. Determination of organic acids in tobacco leaves and isolation of organic acids by paper chromatography; J. Agr. Chem