“The history of the knowledge of the phenomena of life and of the organized world can be divided into two main periods.… — Paul Ehrlich Copy Share Image
“We may regard the cell quite apart from its familiar morphological aspects, and contemplate its constitution from the purely chemical standpoint. We are obliged… — Paul Ehrlich Copy Share Image
“The history of the knowledge of the phenomena of life and of the organized world can be divided into two main periods. For a… — Paul Ehrlich Copy Share Image
