First Meeting. March 2, 1870.
The Rev. Canon Wilson in the chair.

The following new members were elected: — H. W. Williams, R. H. Rhodes, H. R. Webbe, T. J. Curtis, and Rev. W. C. Harris.

Mr. Fraser drew attention to a paragraph in the “Athenæum,” of date 28th September, 1869, describing as a probable novelty, an arrangement of variously coloured stereoscopic slides, by which the colours were blended in the common object. He exhibited a slide of the kind described which had been in his possession for some years, and pointed out that the contrivance might be employed as a sort of ophthalmometer, for testing the comparative strength of the eyes, which were not always of equal power.

Dr. Powell exhibited a Microspectroscope, — an addition to the microscope of five prisms for the refraction of light, — and showed the dark bands characteristic of blood, aniline, and permanganate of potash.