223 
The following gentlemen, whose names have been duly 
proposed and seconded, were elected Associates of the 
Section — the consent of the Parent Society having been 
obtained: — Dr. Leslie H. Jones, F.L.S., Limefield House, 
Cheetham Hill; Mr. Edmund S. Schwab e, Pyecroft House, 
Cheetham Hill; Mr. John Pay Hardy, the Owens Col- 
lege ; Mr. A. Knoop, Moss Lane, Chorlton-on-Medlock ; Mr. 
F. J. Faraday, F.L.S., Brazennose Chambers, Brazennose 
Street; Mr. George Alexander Kennedy, Winton Works, 
Patricroft. 
Ordinary Meeting, March 15th, 1886. 
Dr. Alcock, President, in the Chair. 
Mr. H. C. Chadwick, of Peter Street ; Mr. E. J. Bles, 
Moor End, Kersal ; Mr. Geo. J. Crosbie Dawson, Kersal ; 
and Mr. G. H. Fowler, B.A., Owens College, were duly 
elected Associates of the Section. 
Dr. Alexander Hodgkinson read a paper on the Diffrac- 
tion of Microscopic Objects in relation to the resolving 
power of objectives. To illustrate this he exhibited, under 
the microscope, two sets of lines, one set ruled ^^th of a 
millimetre, the other of a millimetre apart ; and demon- 
strated that definition is entirely due to diffraction spectra. 
On Hypoceplialus Armatus (Desm.). 
Mr. James Cosmo Melvill, M.A., F.L.S., exhibited a 
specimen of the rare coleopterous insect, Hypocephalus 
Armatus (Desm.) from Minas Geraes and Bahia, and com- 
pared it with other species of various families considered as 
allied forms by different authorities. No Beetle, and per- 
