6 BOTANICAL GAZETTE [JANUARY 
minous bodies, etc., and the method of their translocation in 
the plant body. Although his experiments upon these problems — 
were conducted with the assistance only of the very crude 
methods of microscopical technique then in vogue, despite our 
vastly improved methods we are scarcely able to repeat them. 
But, according to Sachs’ own words, the most important out- 
come of this work was the idea which it prompted, that he a 
must seek the true organs of assimilation in the chlorophyll — 
bodies, a theory which Sachs stated first hypothetically, yet 
precisely, and which later was established by him through | 
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ed for me the wonderful ‘Um 
schwung” which the appearance of the Handbook had gained him 
When De Bary, in the spring of 1867, resigned his chair at aie 
Freiburg, Sachs was called to it, and one year later he succeeded — 
