1S89.] MICROSCOPICAL JOURNAL. 279 



jectives. Some of the foreign makers also do this, but it appears to be 

 the more general custom abroad to place the name only upon the box, 

 although this is by no means the invariable rule. The continental 

 makers usually- engrave the number only (which is an arbitrary one, 

 as No. 3, No. 5, etc.), upon the objective in the case of the cheaper 

 lenses ; but in the case of higher priced lenses, as oil-immersion lenses, 

 adjustable water immersions, etc., the maker's name may also, perhaps 

 now does most generally, appear. 



5. By Fr. J. Emmerich, Sr., New York City. 



Most of the makers in Europe, as far as our experience goes, do not 

 put their names on their make, as we have had quite a number of Har- 

 taack's, Gundlach's, Varick's, and other makers, and never found their 

 names on their objectives. It may be, however, that on particular oc- 

 casions, or upon requests, these makers would not refuse to have their 

 names put on, and we think, in the interest of buyers and investigators, 

 it would be desirable to have them do it, as we w^ould have more con- 

 fidence in a lens bearing the name of its maker than in one without it, 

 because the latter would not dare to put his name on a bad or objec- 

 tionable article if he cares for hi-s reputation. I am of opinion that all 

 makers should follow the example of Mr. Carl Zeiss, of Jena, whose 

 name is distinctly engraved on every one of the objectives he produces, 

 as from the way they are manufactured under the supervision of Pro- 

 fessor Abbe, there cannot possibly be an inferior article produced or 

 delivered from his workshop. I may, however, add that every buyer 

 should look out that he gets really the genuine article, and would cau- 

 tion him to beware of counterfeits. 



MICROSCOPICAL SOCIETIES. 



Microscopical Society of Washington, D. C. — L. M. Mooers, 



Sec'y. 



October 8. i88g. — The annual election of officers was as follows : — 

 President, Dr. E. A. Balloch ; Vice-President, Dr. A. N. Skinner; 

 Cor. Secy.. Dr. J. M. Lamb; Rec. Secy., Mr. L. M. Mooers; Trea- 

 surer, Mr. J. M. Yznaga ; Curator, Dr. W. H. Seaman. 



Dr. Seaman gave an account of the twelfth annual meeting of the 

 American Society of Microscopists at Buffalo ; also a description of 

 some of the methods of lens-making employed by the Bausch & Lomb 

 Optical Company. 



October 22^ i88g. — A paper was read by Dr. Thos. Taylor on '' Tea, 

 and its Adulterations." The paper was finely illustrated with photo- 

 graphs and colored camera-lucida drawings. Prof. Hitchcock gave an 

 interesting description of native cultivation and preparation of tea. The 

 President announced the following committees : — Essays. Mr. V. A. 

 Moore, Dr. Seaman, and Dr. Lamb ; Membership, Doctors Revburn 

 and Gibbs, and Mr. Doubleday. 



ToRREY Botanical Club. 

 Wectnesday^ October 2J . — Professor Schrenk exhibited microscop- 

 ical preparations of cross sections of the leaves of the Witch Hazel, 



