ROSENTHALER

Dr. Leopold Rosenthaler, Professor at the University of Bern, Switzerland, wrote several books of interest to the microchemist during the 1920’s and 1930’s.  His Grundzüge der chemischen Pflanzenuntersuchung, which is devoted to the chemical investigation of plants, went through three German editions.  The third edition [Rosenthaler (1928)], which followed the second by five years, was translated into English in 1930 as, The Chemical Investigation of Plants, by Sudhamoy Ghosh, Professor of Chemistry, School of Tropical Medicine and Hygiene, Calcutta [Rosenthaler/Ghosh (1930)].  Not all of the chemical tests are microscopical, and there are very few illustrations.  Rosenthaler’s 1922 book, Qualitative Pharmazeutische Analyse [Rosenthaler (1922)] is a textbook devoted to the analysis of pharmaceuticals for students of pharmacy and dispensing chemists (Figure 41).  Line drawings (Figure 42) illustrate the microchemical tests.  His 1935 book Toxikologische Mikroanalyse [Rosenthaler (1935)] (Figure 43); deals with the qualitative microchemical analysis of poisons and other materials of importance to the medico-legal chemist.  The 173 text figures include both photomicrographs (Figure 44) and line drawings (Figure 45).

click image to enlarge (116K) Figure 41. Title page of Rosenthaler’s Qualitative Pharmazeutische Analyse (1922).	click image to enlarge (165K) Figure 42. Line drawing of microchemical test in Rosenthaler’s Qualitative Pharmazeutische Analyse (1922).
click image to enlarge (93K) Figure 43. Title page of Rosenthaler’s Toxikologische Mikroanalyse (1935).	click image to enlarge (102K) Figure 44. Photomicrographs of microchemical tests from Rosenthaler’s Toxikologische Mikroanalyse (1935).

click image to enlarge (137K) Figure 45. Line drawings of microchemical tests from Rosenthaler’s Toxikologische Mikroanalyse (1935).