Tracts on the nature of animals and vegetables / by Lazaro Spallanzani.

  • Spallanzani, Lazzaro, 1729-1799. Dissertazioni di fisica animale, e vegetabile
Date:
1799
Catalogue details

Licence: Public Domain Mark

Credit: Tracts on the nature of animals and vegetables / by Lazaro Spallanzani. Source: Wellcome Collection.

    399/422 (page 377)
    €& ce 74 CE n 6 nw nm ” ta] ag “ n a Lay HEADS OF SNAILS REPRODUCED. 379 ly become emaciated unto perfect extin@ion: if, during this time, they recover new eyes, new jaws, a new head, which F have never had the good fortune to fee i in thofe identi- fied after the operation : if this experiment, made with all the precautions I have taken, and which I believe it neceflary to ufe, fuc- ceeds in your hands, and in thofe of the Abbé Spallanzani, I fhall efteem it a fa@, that the parts entirely feparated are repro- duced in thofe animals. But take care, would you defire to make thofe contradictory experiments, without which you cannot be certain of the real reproduétion of a jaw, an eye, or ahead? I abridge the fubje@, becaufe the confequences deducible are in my letter 30 July 1769, which I thank you for having reminded me of in your treatife ---- - «< I pafs tonewts. I have not yet been able to procure the perufal of your memoir: but, excepting the tail, to judge by the obferva- tions | have made upon that of lizards, it does not feem to be capable of reproducing offeous vertebrae; and although I have only had reproduétions of ftumps of the feet cut off feveral fpecies of thofe animals and of frogs, becaufe I have not been able €¢ ty