1899J MICROSCOPICAL JOURNAL. 167 



sisted by Mr. Russell Wright, gave an exhibition with the 

 projection microscope, showing- a series of specimens with 

 various powers of animal and vegetable histology, insect 

 parts etc., also diatoms with dark-ground illumination, and 

 other objects with the lieberkuhn. Mr. Wright said his 

 main purpose had been to show the advances made in pro- 

 jection since his former exhibition in the mathematical 

 theatre of University College some fourteen years ago. 

 Progress, in the main, was due to the increased rigidity of 

 the instrument, permitting better focussing, the use of 

 condensers adapted to the aperture of the objectives em- 

 ployed, better objectives, and, last but not least, a vastly 

 improved screen. He had hoped to have used the electric 

 arc as the source of illumination, but it was found that al- 

 though there was plenty of current available in the mains 

 to the building, the fuses fitted were insufficient to stand 

 it, and, therefore, he had to put up with gas, and, as a re- 

 sult, could not employ the higher magnifications he had in- 

 tended. On Saturday, April 8, there will be a meeting, by 

 permission, at the Royal Botanic Gardens. 



Philadelphia Moss Chapter. — A new science club, has 

 recently been organized for the study of general Bryology. 

 Weekly meetings are held at the Acadamy of Natural 

 Sciences, which will soon be alternated with field meetings. 

 The object being to augment the Academy's collection of 

 Mosses and Hepaticae. 



The officers of the Chapter are — President, Professor 

 A. F. K. Krout ; Vice Pres., Professor Wm. Findlay ; 

 Secretary and Treasurer, Alexander Mac Elwee ; Corres- 

 ponding Secretary, Mrs. Josephine D. Lowe. 



Active students in Cryptogamic Botany, and especially 

 of the Archegoniatae, are eligible to membership in the 

 Chapter. 



The Royal Microscopical Society. — The first president 

 (1840-1) was Professor Owen, afterwards Sir Richard Owen, 

 K. C. B., D. C. L,, M. D., LL. D., F. R. S., etc., whose 

 scientific achievements are known throughout the world. 

 At the first annual meeting on the 15th of February, 1841, 



