60 PROCEEDINGS OF SOCIETIES. 



ceeded to describe in detail the formation of the enamel, the dentine, 

 and the cementiim in a well-developed tooth, and jjointed out, secondly, 

 the departures from this normal condition met with in these several 

 structures, such as the extension of the dentinal tubuli into the 

 enamel, the formation of globular dentine and osteo-dentine, the 

 hypertrophied condition of the cementum known as dental exostosis ; 

 the principal object of the paper being to afford information to the 

 young and general observer relative to the various appearances pre- 

 sented to his notice in examining sections of teeth. 



Memphis (U.S.A.) Microscopical Society. 



At the regular meeting, August 19, the annual election of officers 

 was held, resulting in the re-election of the old board, with S. P. Cutler, 

 M.D., as President, and H. F. Dod as Secretary. 



The Secretary's annual report sets forth — 



The Society was organized August 28, 1874, with a list of twelve 

 members ; and during the year twenty-three others have been added, 

 giving an active membership of thirty-five. A thoroughly good mi- 

 croscope has been purchased, fitted with all needed accessories ; and a 

 collection of several hundred valuable and interesting objects has been 

 accumulated. The regular meetings have always been well attended, 

 and their interest well maintained. The following list embraces the 

 most important " papers " which have been contributed during the 

 year : " Light and Oi:)tics," " Some Forms of Infusorial Life," " Notes 

 on the House-fly," " Tolles' New ^V^h versus his Old ^V*^?" " Danimar 

 as a Mounting Medium," " Blue Glass Illumination for Difficult Tests," 

 " A Method of Mounting Insects Entire," " Notes on Micro-crystallo- 

 graphy," " Modern Wide-angled versus- Old Low-angled Objectives," 

 " On the Examination of a Certain Pathological Specimen," " On the 

 Organisms in ' Happy Hollow ' Water," " Measurements of the Striae 

 on the Diatoms of the Probe-Platte," " On the Preparation of Silica 

 Films," " Further Remarks on Wide versus Narrow Angles," " Mea- 

 surements of Probe-Platte," " The Cyclops," " Plant Crystals," 

 " Preparation of Coal Sections," "^The Water Flea," " Silica Films 

 and their Bearing on the Structure of Diatoms," most of which have 

 been publislied in the journals of this country or England. Many 

 minor articles have also been jsresented. The Society's indebtedness 

 to its corresijonding members for their valuable aid was most heartily 

 acknowledged. 



On ballot, C. B. Johnson, M.D., of Providence, and Ed. Wheeler, 

 Esq., of London, were elected corresponding members. Valuable 

 contributions of prepared objects were received from Dr. C. B. John- 

 son and Mr. Henry Mills, for all which a vote of thanks was passed. 



The President's annual address was then read, after which the 

 Society adjoui-ned to first Thursday in September. 



