The Journal of the Postal Microscopical Society, volume 1
The Journal of the Postal Microscopical Society, volume 1
Postal Microscopical Society
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He works with wet collodion, and finds that an exposure of two minutes suffices in the case of an enlargement of seven hundred diameters. I have endeavoured to make the foregoing article as plain and simple as possible, remembering that my own early attempts at Photo-Micrography were attended with many difficulties and failures ; for all the articles which I read bearing upon the subject were so utterly unpractical, or so highly scientific, that a beginner could glean from them but little infor...mation of any real value. Digitized by VjOOQIC [81] Sti?Iar(a ipaluboea^ By a. Hammond, F.L.S. Plate 8. THE subject qf this notice was brought to me a few weeks ago by my friend Mr. Baily, who informed me that he had witnessed the act of fission in a similar specimen a day or two previously. The alleged reproduction of the Naid worms by a process of fission, as I stated in a note on my paper on Tubifex, received the most strenuous denial ft-om Dr. Wil- liams, the author of the report on the British Annelida.* After quoting a statement by Professor Owen, to the effect that in this very worm a proboscis shoots out from the posterior portion, which is then detached from the parent worm, he says : — " On the authority of hundreds of observations laboriously repeated at every season of the year, the author of this report can declare with deliberate firmness, that there is not one word of truth in the above statement.
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