Boyle Mangold (2 results)

The movements of the isolated buccal mass of Octopus vulgaris have been investigated. The beaks undergo rhythmic cycles of activity in the absence of applied stimulation and after electrical stimulation of the inter-buccal connective. Initial opening, closing, retraction and re-opening phases of movement are described. This cycle of movements is taken to resemble those in the intact animal. Anatomical and electrical evidence identifies the superior mandibular muscle as being partly responsible for the closing and retraction phases of movement. The inferior buccal ganglion determines the sequence of these buccal movements, but modification by sensory feed-back from the musculature is also implied. The preparation will allow a closer comparison of the control of movement in cephalopods and gastropods. 15 pp., 9 figs, gr. 8.

Condition: Very Good. pp 647-678 (Pppp1-Tttt4 - lacking the engraved plate) An early edition of the Philosophical Transactions of the Royal Society containing contributions from Van Leeuwenhoek, Hevlius, Flamsteed, Cassini and a review of Robert Boyle's Experiments, Notes. Quarto pamphlet bound by Sotherans of London marbled paper covered boards with an antique-style paper label to the upper cover and new endpapers The text is close cropped, affecting signatures at the foot of the page and even a line of text on a couple of pages. There is a big stain across the first leaf. Even by the standards of the Royal Society this is an unusually interesting compilation with Antoni Van Leeuwenhoek writing about his discovery of 'sels or pores' in trees, Hevelius, Flamsteed and Cassini provide observational data on a solar eclipse, 23 June 1675, and unsigned reviews of new works by Boyle and other writers. Very Good Please contact Christian White Rare Books Ltd for more information or images of this item.