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A very useful review of the dark-field illumination and ultramicroscopy, with especial reference to medicine and biology, particularly botany. The author's researches lie in the field of the minute structure of cells. The importance of dark-field illumination in recognizing the Spirochœta pallida is given due prominence. A full bibliography is appended. The illustrations are good.
Dunkelfeldbeleuchtung und Ultramikroskopie in der Biologie und in der Medizin.. JAMA. 1910;LIV(17):1393. doi:10.1001/jama.1910.02550430045024