Bin L I OCR A PI I Y 345 



Microscopical bulletin and science news. Illust. Philadelphia, 1883 . The editor, 

 Edward Pennock introduced the term "par-focal" for oculars (see vol. iii, p. 31). 



Monthly microscopical journal. Illust. London, 1869-1877. 



Nature-. Illust. London, 1869 . 



The Observer. Portland, Conn., 1890-1897. 



Philosophical Transactions of the Royal Society of London. Illust. London, 1665 . 



Proceedings of the American microscopical society, 1878 . 



Proceedings of the Royal Society. London, i 1 - 



(Ju.irterly journal of microscopical science. Illust. London, 1853 + . 



Rev. de Metallurgie. Paris, 1904 . 



Science, a weekly journal devoted to the advancement of science. New York. N. S. 

 1*95 



Science Record. Boston, 1883-4. 



The Scientific American. New York, 18454 . 



X.eitschrift f. Angewandte Mikroskopie. 1898+. 



/eitsehrift ftlr Instrumentenkuude. Berlin,' 1881- . 



Zeitschrift ftir physiologische Chemie. Strassburg, 1877 . 



X.eitschrift fur wissenschaftliche Mikroskopie und fur mikroskopische Technik. Illust. 

 Braunschweig, 1884-. Methods, bibliography and original papers. 



