116 JOURNAL OF THE [Octobcr, 



2. Spiracles of the larva of the Nut-weevil. 



3. Spiracles of the Roach. 



4. Spiracles of Dragon-fly. 



5. Spiracles of the larva of the Hawk-moth. 



6. Spiracles of Cicada. 



7. Spiracles of Bishop's Mitre. 

 Nos. 2-7 by F. W. Leggett. 



8. A Turn-table modified for cutting cells : by Frank D. 

 Skeel. 



9. Sections of petrified wood from Cairo, Egypt, collected 

 by Dr. H. Carrington Bolton : by T. B. Briggs. 



10. Section of red Syenite from the Obelisk in Central Park, 

 New York : by T. B. Briggs. 



11. Spicules and gemmules of Sponge from nest of Termites, 

 prepared by Mr. J. Beaumont, Colon, S. A.: by P. H. Dudley. 



12. Pond-life ; Melicerta ring ens, M. tiibicularia, Actino- 

 sphcErium Eichhornii, Paludicella Ehretibergii (one week old) : by 

 Stephen Helm, of 417 Putnam Avenue, Brooklyn, N. Y. 



Mr. Dudley explained his exhibit of the stand and objectives 

 used by the late Dr. J. W. Draper, and read an account of the 

 process employed, as described in Dr. Draper's " Scientific 

 Memoirs." 



Dr. E. G. Love questioned the claim for Dr. Draper, that he 

 had taken the first photomicrographs, and pointed to the facts 

 that Sir Humphry Davy and Wedgewood in 1S02, succeeded in 

 producing photomicrographs by the sun-microscope, which, 

 however, were not permanent ; that Dr. Hodgson in 1840, using 

 the gas-microscope and daguerreotype plates, produced photo- 

 micrographs ; and that in France, in 1844, there was published 

 an atlas of photomicrographs ; while Dr. Draper's work was 

 done between 185 1 and 1S56. 



Mr. F. W. Leggett described at length and in an interesting 

 manner his exhibit of spiracles from six orders of insects. 



Dr. F. D. Skeel described his modification of the turn-table 

 for cutting cell^ and accomplishing similar work. 



Mr. C. F. Cox said that he naturally felt interested in any 

 modification of this useful accessory to the microscope, but he 

 wished to improve this opportunity to protest against the 

 unnecessary complication and expense, which had been intro- 

 duced into the self-centering turn-table by manufacturers, since 



