Author of: “A Monograph of the Fossil Fishes of the old red Sandstone of Britain,” Part I., 1870; “Comparative Longevity,” 1871; “Contributions to the Developmental History of the Mollusca,” 1875; and the English Edition of Haekel’s “History of Creation.” Contrib. to “Athenæum, Academy, Nature,” Chief Editor of “Quarterly Journal of Microscopic Science.” “… He has taken a prominent part in the defence of Scientific Experiment on live animals.”--_Men of the Time_, 10th Edit., p. 604. “If you allow experiment at all, you must admit the more of it the better, since it is certain that for many years to come the problems of physiology demanding experimental solution will increase in something like geometrical ratio instead of decreasing.”--E. Ray Lankester, _Spectator_, Jan. 10, 1874. =Lange, O.= B. 1834. Path. Lect. Univ. Copenhagen, 1877; formerly Asst. to Prof. Schiff, Physiol. Lab., Florence. Editor of “Hospital Journal.” =Langendorff, Oscar.= Prof. Physiol. Med. Fac. Univ. Königsberg. Author of “Versuche ueber die Pancreas-Verdauung der Vögel,” Mueller’s Archiv., 1879; Contrib. to Centralb. f. d. Med. Wiss., Archiv. fuer Anat. u. Physiol., etc. Found by experiment that after frogs had been immersed for several hours in oil or water, or after they had been suffocated by ligature of the aortic bulb, their muscles had an acid reaction.--_Med. Centralb._, 1882, No. 50. =Langley, J. N.= M.A., St. John’s Coll., Camb. Author of “The action of Pilocarpin on the sub-maxillary gland of the dog,” Studies from the Physiol. Lab. Camb., Part III., 1877, p. 42. “On the changes in serous glands during secretion,” Journ. of Physiol., Vol. II. (1879), p. 261; “On the structure of serous glands in rest and activity,” Proc. Roy. Soc. Lond., 1879, p. 377; “Preliminary account of the structure of the cells of the liver and the changes which take place in them under various conditions,” Proc. Roy. Soc., Vol. XXXIV., 1882, p. 20.