


96 THE NORTHERN MICROSCOPIST. 

much admired. A capital musical programme was rendered by Messrs. J. 
Baguely, J. Tomlinson, W. H. Varley, Fred Marwood, and John Davis. 
LINCOLN SCIENCE CLUB.—The members of the Lincoln Science Club 
held their first conversaztone in the County Assembly-rooms on Wednesday 
evening, Feb. 15th. Invitations had been issued to the leading residents, and 
the result was a crowded attendance. The gathering proved to be of a most 
enjoyable and instructive character, and on all hands was pronounced a com- 
plete success. Shortly after the guests had assembled, the President, on behalf 
of the Club, gave them a kind and hearty welcome, and in a few words dwelt 
upon the advantages to be derived from gatherings of this kind. He subse- 
quently read a paper on Geology, in which he alluded to the pleasure and 
profit of a study of that science, and pointed out certain features of interest in his 
collection of geological specimens, which was on view in the room.—Mr. J. F. 
Burton illustrated the vibration of musical sounds by means of a brass vibrating 
plate. The examples were exceedingly interesting.—The Rev. R. J. Doble 
exhibited electrical apparatus, including a large induction coil, vacuum tubes, 
&c., and delivered a short address, explanatory of the laws, or rather the 
phenomena, of the induction coil. The microscopical department was well 
attended. Polarization of light under the microscope was illustrated by Mr, T. 
Sympson, F.R.C.S. There are four principal processes by means of which a 
beam of light may be polarized—reflexion, ordinary refraction, double refraction, 
and scattering by small particles. Of these, double refraction is used with the 
microscope usually in the form of two Nicol’s prisms, one employed as an 
analyser, the other as a polarizer, The following slides were shown under 
polarized light:—Chlorate of potash, carded sheep’s wool, tartrate of lime, 
cholesterine, aspartic acid, sulphate of nickel, Cornish granite, Brighton pebble, 
breccia from Labrador, Rowley-ragstone, zeolite, section of ox’s tooth, gallic 
acid, cuticle of wheat straw, silicious cuticle of Dutch rush, tendon of ox, young 
oysters, vertical section of rhinoceros horn, horizontal section of ditto, hoof of 
horse, injected toe of white mouse, hoof of ass. Living organisms, including 
flydra fusca and Volvox globator, were exhibted under the microscope by Mr. R. 
J. Ward, and some pleasing effects of polarized light, together with miscel- 
laneous objects, were shown under similar instruments by Mr. J. G. Williams, 
and others. Other microscopes were lent by Dr. Harrison, Mr. T. M. Wilkin- 
son, Mr. Wallace, &c. The Rev. H. G. Jameson was in charge of his 
spectroscope, exhibiting very beautifully, spectra of metals with an induction 
coil. A telegraphic apparatus was also on the same gentleman’s table. Mr. 
F, M. Burton, of Gainsborough, exhibited a number of specimens of Algze and 
Zoophytes—plants and plant-like animals, showing the similarity between plant 
and animal life, only to be found in the lower organisms. In one of the ante- 
rooms a large triunial lantern and oxy-hydrogen microscope was exhibited by 
Mr. A. H. Simpson, F.R.M.S., of the University College, Nottingham, who 
was introduced by Mr. Cant. Various natural microscopic objects were repre- 
sented with remarkable clearness, and the heart-beating and circulation in an 
ordinary water flea plainly and vividly shown. 
LIVERPOOL MICROSCOPICAL SOCIETY.—The third meeting of this 
Society was held at the Royal Institution, Colquitt-street, on Friday, March 
3rd... Mr.. J. Sibley, Hicks, -F.R.C.S.,. F.R.M.S;,oread..a paper ‘‘On some 
varieties in the mouths of insects,” illustrated by the oxy-hydrogen lantern. 
At the conclusion of which the meeting resolved itself into a conversazione, 
when the following subjects were illustrated :— 
Heese NINE SSh ss eee carina c. CORRS RAT a H. C. Beasley. 
Crystals—Native Sponge Copper ............ J. T. N. Thomas. 
APH AADADULER. °F RIA pi a eee tae J. K. Gardner. 
Diatomacese— iWin... scivesn ve gdeoewes canes W. J. Baker. 



