1873.] lol [Sellers. 



so-called white corpuscles maybe in reality veritable amebse. living in the 

 blood. He stated that the power used was a T V immersion objective, and 

 with the eye-piece used gave 500 diameters, field being T ^ of an inch in 

 diameter, was enlarged to five inches, and in this field he had seen as 

 many as ten of these amoeboid forms at the same time. Joseph G. 

 Richardson, M.D., in his handbook of Medical Microscopy, p. ITT. says : 

 "One of the most remarkable properties of the white blood globules is 

 their power of amceboid motion, a movement so named because it pre- 

 cisely resembles that of the Amoeba, a genus of Infusoria." Then follow* 

 a description of the Amoeba, taken from the Michrographic Dictionary. 

 Mr. Holman's slide may serve a good purpose in the examination of these 

 curious forms in blood, as it is also convenient in the examination of any 

 uids containing minute forms. 



Stated Meeting, April Uh, 1873. 



Present, 28 members. 



Vice President, Mk. Fkaley, in the Chair. 



Dr. La Roche and Mr. Henry Pemberton, new members, 

 were introduced to the presiding officer and took their seats. 



A letter accepting his appointment to prepare an obituary 

 notice of the late Dr. Hugh L. Hodge was received from 

 Dr. Penrose, dated 1331 Spruce street, March 29th, 1873. 



A letter of envoy was received from Prof. J. D. Whitney, 

 dated Cambridge, Mass., March 31st, 1873. 



Donations for the Library were received from the Hon. 

 George Bancroft, of Berlin; the Rotterdam S. of Ex. 

 Science; the Bureau des Longitudes, Geographical Society 

 and Revue Politique; the Belgian Academy; the Royal 

 Astronomical Society and London Xature; the Geological 

 Survey of Canada and Montreal Xatural History Society ; 

 the Xew Bedford Free Public Library ; the American Jour- 

 nal of Science and Prof. 0. C. Marsh, of Xew HaVen ; the 

 Philadelphia Academy of Natural Sciences, Franklin In- 

 stitute, College of Pharmacy, Journal of Pharmacy, Penn 



