Abstract
CAMBRIDGE. Philosophical Society, May 5.—Dr. J. Larmor, vice-president, in the chair.—Regeneration in Samia ailanthus^ by Mr. H. H. Brindley. With the object of ascertaining the degree of regeneration and how far it is uniform in the imago after injury to the larva in particular stadia and to particular extents, amputation experiments were made on the legs of this moth in larva. Owing to the large number of cases in which the imago did not emerge the results were somewhat limited, but sufficient instances were observed to suggest (a) that compared with Orthoptera and other non-pupating forms the results of injury are very variable, (b) that the earlier the instar injured the imaginal limb more closely approaches the normal in form and size, {c) there is no uniformity in the presence of the terminal claw apparatus without regard to the number of limb joints such as has been observed in Arachnids, Myriapods and several orders of non-pupating insects, and (d) that the length of time spent in pupa and the degree of injury to the larval limb seem not to influence the degree of regeneration. As regards (b) the results are in general accord with those of Newport on Vanessa and Chapman on Liparis, though not as regards (c) with Newport. The experimental evidence obtained also seems to confirm Gonin's o opinion, based on anatomical grounds, that the imaginal limb is a distinct structure from the larval limb during the instar preceding pupation.—On the unit of classification for systematic biology, a reply to Mr. Bernard, by Mr. J. Stanley Gardiner.—Remarks on Marconi's system of telegraphy, by Mr. H. M. Macdonald.—On trinodal quartics, by Mr. A. B. Basset-On a definite integral, by Mr. T. J. I*A. Bromwich.—Reflection and transmission of light by a charged metal surface, by Mr. P. V. Bevan.—Note on a general numerical connection between the atomic weights, by Mr. C. A. Vincent. If a list of all the atomic weights in ascending order of magnitude be taken and the order in this list be called n, then the nth. atomic weight, from ^ = 3 to ^ = 60, is given by the equation
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Societies and Academies . Nature 66, 142–144 (1902). https://doi.org/10.1038/066142a0
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DOI: https://doi.org/10.1038/066142a0