Report of the seventh anniversary ... held ... February 10th

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Page 11 - On the intimate structure of bone, as composing the skeleton in the four great classes of animals, viz. Mammals, Birds, Reptiles, and Fishes, with some remarks on the great value of the knowledge of such structure in determining the affinities of the minute fragments of organic reQDEKETT, J. — mains, ii, 46-68 : — and. Additional observations on the intimate structure of bone, ii, 59-64, pis.
Page 5 - According to annual custom, the Council have to make the following Report on the state and progress of the Society during the past year. The number of Members at the last Anniversary was, Ordinary Members, 141 ; Associates and Honorary, 5 ; giving a total of 146.
Page 16 - ... a Nicol's or single image prism, being a portion of a crystal of Iceland Spar, cut, and combined with a piece of glass, so as to throw out of the field of view one of the two images produced by the double refraction of the crystal. This he described as being the most eligible for the compound microscope, in as much as it is perfectly free from colour, and requires very little adjustment.
Page 21 - In 1829, after the first achromatic object-glass had been successfully made, Dr. Goring wrote that " microscopes are now placed completely on a level with telescopes, and like them must remain stationary in their construction.
Page 22 - ... the same skill and talent which have wrought these great and valuable improvements in the instrument will continue to aid and assist the scientific world, by aiming at and achieving a still further degree of perfection." The great advances which have been made in microscopic science within the last few years, and the immense number of valuable contributions to animal and vegetable physiology alone, with which the scientific journals of this and other countries are more or less filled, all tend...
Page 11 - Haversian canals and the bonecells, with their little tubes proceeding from them, and he applied the characters derived from the bone-cells to the determination of the class of animals to which any minute fragments may have belonged ; for he had ascertained that...
Page 13 - ... 1840.— Jard. Nat. Lib. Ichth. II. 2. Philosophy of Instinct and Reason. 8. Edinb. 1837. 3. Introduction to the Study of Nature, illustrative of the Attributes of the Almighty. 8. London, 1834. BUSK (Geo.). 1 . On the Young of a species ofIxodes from Brazil. — Trans. Mierosc. Soc. I. p. 88. 2. Observations on the Structure and Nature of the Filaria Medinensis or Guinea Worm.
Page 16 - Brewster, respecting the advantages likely to be derived from the application of polarized light in the microscopic examination of delicate structures, Mr. Legg described a series of polarizing apparatus, which may be readily adapted to almost any microscope, consisting, 1st, of a bundle of plates of crown glass, from which the light is to be reflected at an angle of 56 in which position one portion only of the light is refracted, and another transmitted, each of which positions consists of light...
Page 18 - ... transverse lines, giving the whole the appearance of being covered with a delicate net-work. Four drawings of this object were exhibited, showing it in as many different positions, making a complete revolution of the field in which the markings just mentioned were distinctly visible.
Page 17 - In the third experiment the selenite plate was interposed, the images were now coloured and presented the complimentary colours at every quarter of a circle. When the hole in the piece of brass was of a large size, the images were seen to overlap and white light was produced. The author concluded with some remarks upon the service likely to be rendered to microscopical investigation by the employment of polarized light.

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