Reinhardt Thiessen 



Ph.B., Lawrence College, Appleton, Wisconsin, 1895; S.B., The University of Chicago, 1903; Ph.D. (Plant 

 Morphology and Plant Physiology), Chicago, June, 1907 



CHEMIST AND MICROSCOPIST, U. S. BUREAU OF MINES, 

 PITTSBURGH, PENNSYLVANIA 



Assistant Chemist and Mioroscopist, Technologic Branch, U. S. Geological Survey, 

 Washington, D. C, 1907-10; Chemist and Microscopist, U. S. Bureau of Mines, Washing- 

 ton, D. C, 1910—. 



Member: Amer. Assoc. Adv. Sci. (Fellow), Biol. Soc. Wash., Bot. Soc. Amer., National 

 Geog. Soc. 



PUBLICATIONS 



The vascular anatomy of the seedingof Dioon edule. Bot. Gaz. 46: 357-380. 1908. 

 — Origin of coal. U. S. Bur. Mines Bull. 38. 1914. — On the constitution and genesis 

 of certain lignites and sub-bituminous coals. Eighth Internat. Cong. Applied Chem. 

 25: 203. 1912. 



31 



