
682 The American Naturalist. [July, 
SCIENTIFIC NEWS. 
The American Society of Microscopists.—This association, 
now in the thirteenth year of its existence, will hold its fourteenth 
annual meeting* in Washington, D. C., August roth, and continue in 
session five days. Its roll of active members contains about three 
hundred and fifty names, embracing very nearly every person in the 
United States who is at all prominent as a microscopist. Its member- 
bership consists of two distinct classes,—viz., professional men and 
students of the natural sciences, who use the microscope in their daily 
avocations as an instrument of research, diagnosis, or precision ; and 
amateurs, or those who find pleasure and profit in the revelations of 
the instrument. Many of the latter class, from having early chosen 
special lines of study and investigation, have acquired high reputations 
in their respective departments of microscopical research. In its 
earlier years this class predominated in the membership of the society, 
but at present the professional element is largely in excess. 
The sixty-first meeting of the British Association for the Advance- 
ment of Science will commence on Wednesday, August rgth, 1891, at 
Cardiff, Wales, under the direction of the following officers : President 
elect, William Huggins, Esa, D.C.L., LLD, FRS., ERAS; 
vice presidents elect, ‘The Right Hon. Lord Windsor, Lord ete: 
of Glamorganshire ; The Most Hon, The Marquis of Bute, K.T. 
The Right Hon. Lord Rayleigh, M.A., D.C.L., LL.D., Sec.R. S., 
F-RA S., FRGS. ; The Right Hon. lao Tredegar ; The Right 
Hon. Lord NOE GCB FERS, FRGS ; Sir]. TD. Llewelyn, 
Bart., F.Z.5.; Archibald Geikie, Esq, For.Sec.R.S., F.R.S.E., 
Pres.G.S., Director-General of the Geological Survey of the United 
Kingdom ; general treasurer, Prof. A. W. Williamson, Ph.D., LL.D., 
F.R.S., V.P.C.S., 17 Buckingham Street, London, W. C.; general 
secretaries, Captain Sir Douglas Galton, K.C.B., D.C.L., LL.D., 
F.R.S, FELS., EGS., F.R.G.S.; A. G. Vernon Harcourt, Esq., 
MAW, DCE, int. FRS., ECS. ; ; assistant general secretary, G. 
Griffith, Esq., M.A., F.C.S. ; local ee the meeting at 
Cardiff, R. W. Akis. Esa., BSc., ECS he W 
Lloyd Tanner, M.A., FRAS. Bank ar e Cardiff; local 
treasurers for the meeting at Cardiff, T. Forster Brown, Esq., M.Inst. 
C.E. ; Henry Heyword, Esq., a F CS, 

