LITERARY AIDS, 49 
Braunschweig, 1867-1872; second edition, 1883. By the same 
author, “‘ Grundziige der allgemeinen Mikroskopie,” Braun- 
schweig, 1885. 
Hager, ‘‘ Das Mikroskop und seine Anwendung.” Seventh 
edition, with 316 woodcuts. Berlin, 1886. 
Behrens, ‘‘ Hilfsbuch zur Ausfiihrung mikroskopischer Unter- 
suchungen im botanischen Laboratorium,” Braunschweig, 1883, 
pp. 398. With illustrations. American edition, entitled: ““The 
Microscope in Botany,” translated by Rev. A. B. Hervey, and 
R. H. Ward. Boston, 1885. 
Stein, ‘‘Das Mikroskop und die mikrographische Technik,” 
Halle, 1884. With illustrations. 
Poulsen, ‘‘ Botanische Mikrochemie,” Cassel, 1881, pp. 83. 
American edition, entitled: ‘‘ Botanical Micro-chemistry,” trans- 
lated by Professor William Trelease. Boston, 1884, pp. 118. 
E. Chemistry. 
Husemann and Hilger, ‘‘Die Pflanzenstoffe.” 2 volumes, 
second edition, Berlin, 1882-1884. This book, which is very 
complete from a chemical standpoint, dlso elucidates the 
physiological action of the constituents of plants. 
Dragendorff, ‘‘ Die qualitative und quantitative Analyse von 
Pflanzen und Pflanzentheilen,” Gottingen, 1882, pp- 285. Eng- 
lish edition, entitled: ‘‘ Plant Analysis, Qualitative and Quanti- 
tative,” translated by Henry G. Greenish. London,’ 1884, pp. 
280. 
Ebermayer, ‘‘ Physiologische Chemie der Pflanzen,” Berlin, 
1882. 
F. Illustrations of Drugs. Figurative representations of 
drugs in an ordinary sense are of less value than collections, 
perhaps with exception of the Cinchona barks, in which a com- 
parison with illustrations may occasionally be desirable. Such 
colored illustrations of the Cinchona barks are presented in a 
very handsome form by the following: 
Bergen (H. von), ‘‘ Monographie der China,” Hamburg, 1826. 
Quarto, with 7 plates. ; 
Weddell, “Histoire naturelle des Quinquinas,” Paris, 1849. 
Folio. The plates 28, 29, 30. grey me ey 
4 MISSOURI 
BOTANICAL 
GARDEN. 
Sina 
