An essay on animal reproductions / by Abbé Spallanzani ; translated from the Italian [by M. Maty].

  • Lazzaro Spallanzani
Date:
1769
Catalogue details

Licence: Public Domain Mark

Credit: An essay on animal reproductions / by Abbé Spallanzani ; translated from the Italian [by M. Maty]. Source: Wellcome Collection.

    20/86 page 16
    ( *6 ) I. by cutting tranfverfely through one half of the body, and leaving the other un¬ touched ? 2. By cutting the worm almofl entirely through, and leaving him hanging only by a thread ?. From a tranfverfe, I proceeded to a longi¬ tudinal, divifion, in order to find, i* What would happen to the earth-worm from a longitudinal divifion carried through his whole length ? 2. By extending the longi¬ tudinal fedtion to the length of an inch in the fore part ? 3. By doing the fame in the back part ? 4. By taking away a longitudi¬ nal piece of the i n telline ? 5. By cutting off a piece of the great artery, and thus interrupting the circulation through it? 6„ By opening part of the body longitudinally, either on the back or belly ? As many of thefe experiments fucceeded on earth-worms, when whole, they were afterwards repeated on heads, middle-pieces, and tails. It was necefiary to prefix to the prefent inquiry an accurate anatomical defcription of the earth-worm. It is not fufficient to fay that a new tail or a new head is repro¬ duced, unlefs at the fame time we defcribe the number, diverfity, and nature, of the parts
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