88 JOURNAL OF THE [july, 



OBJECTS EXHIBITED. 



Sections of Agatized Wood, Dadoxylo?i (?) from Chalcedony 

 Park, Arizona. 



1. Transverse section, showing concentric growth. 



2. Transverse oblique section, showing cell-markings. 



3. Transverse section, mostly silicified, obscuring structure. 



4. Radial section, showing structure of medullary rays, resin- 

 cells, and double rows of discoid markings of wood-cells. 



5. Radial section, showing fungi in cells. 



6. Tangential section, showing discoid markings and ends of 

 medullary rays. 



7. Tangential section. 



These objects — Nos. i to 7, inclusive — were prepared and 

 exhibited by Thomas B. Briggs, and their structure was 

 explained by P. H. Dudley. 



8. Two mounts of Diatoms, prepared by Toomb : by E. A, 

 Schultze. 



9. The new Microscopical Lamp of Kochs and VVolz, Bonn : 

 by LuDwiG Riederer. 



Meeting of March 15TH, 1889. 



THE ELEVENTH ANNUAL RECEPTION. 



Held in the Rooms of the Society. Living objects only 

 exhibited. 



OBJECTS EXHIBITED. 



1. Desmids : by Edgar J. Wright. 



2. Diatoms : by James Walker. 



3. VoRTiCELL^ : by George E. Ashby. 



4. Hydra: by E. A Schultze. 



5. Daphnia, or Water-Flea : by William G. De Witt. 



6. Cilia of Mussel : by J. D. Hyatt. 



7. Cyclosis :^ in Vallisneria : by William Wales. 



8. in NiTELLA Flexilis : by William Beutten- 



muller. 



9. in Anacharis : by Ludwig Riederer. 



10. in Hairs of Tradescantia : by Charles 



F. Cox. 



