536 
Proceedings of the Royal Society 
iron disc in the receiving telephone, and had found that even wood, 
vulcanised india-rubber, tinfoil, and paper, might be employed for 
the same purpose — though not with very good results. In the 
transmitting instrument Mr Blyth had managed to employ a block 
of iron 8 inches thick. 
Professor Tait also exhibited a double mouthpiece, by means of 
which it is easy for two players to produce chords from a French 
horn. 
The following Gentlemen were elected Honorary Fellows 
of the Society : — 
Otto Struve, St Petersburg. 
Professor J. N. Madvig, Copenhagen. 
Professor Balfour Stewart, Manchester. 
The following Gentlemen were duly elected Fellows of the 
Society : — 
W. H. Allchin, M.B. (Bond,), M.B.C.P., Wimpole Street, London. 
Richard Norris, M.D., Professor of Physiology, Queen’s College, Bir- 
mingham. 
Daniel John Cunningham, M.D., 9 Gladstone Terrace. 
Alan Macdougall, Memb. Inst. C.E., North British Railway, Miliburn 
Tower, Corstorphine. 
John Frederick Bateman, F.R.S., V.P. Institution C.E., 16 Great 
George Street, Westminster. 
William King, M.A., Stewart Villa, Dean. 
P. R. Scott Lang, B. Sc., St Ronan’s, Viewforth. 
Monday , 21 st January 1878. 
Sir WILLIAM THOMSON, President, in the Chair. 
The Canon of Sines for each 2000th part of the quadrant, 
to 33 places, and true throughout to the thirtieth figure, by 
Edward Sang, was laid on the table. 
The following Communications were read : — 
1. On the Tabulation of all Fractions whose values are 
between two prescribed limits. By Edward Sang. 
2. Can the Law of Multiple Proportions be demonstrated 
from Analytical Data ? By W. Dittmar. 
