Thursday 29 April 1669

Up, and to the Office, where all the morning, and at noon dined at home, and then to the Office again, there to despatch as much business as I could, that I might be at liberty to-morrow to look after my many things that I have to do, against May-day. So at night home to supper and to bed.

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Terry Foreman  •  Link

The Royal Society today at Arundel House — from the Hooke Folio Online

Apr. 29. The curator produced his magneticall watch improued by hauing soe contriued the magneticall Ballance (which is insteed of a Pendulum as to make it vibrate as Little arches as shall be desird thereby to make the Vibrations always aequall and the magnet to haue a stronger influence vpon the said Ballance. It was again ordered that a hand shewing minutes & seconds should be added to it, thereby to compare it with a Pendulum for an assurance of its aequall going. The curator mentiond that he had yet another way for measuring time Exactly wherein a Suddain turning motion should not cause a stop or Disorder as it did in this way.

There were also made 2 microscopicall obseruations. 1. of the texture of fatt. which apppeared to be like froth full of cells. the other of a kind of mould vpon Bookbinders Paste, which was found to haue a fine mosse growing on it: that had on the tops of its stems a head Like seed. --

mr neiles theory of motio[n] [ ]…

Terry Foreman  •  Link

"[Neile] entered the debate on the theory of motion, as a critic of the empiricist stance of other members. His own theory of motion was held up from publication by unfavourable peer review by Wallis, in 1667; a revision was communicated to the society on 29 April 1669. Neile objected to Wren's 1668 work on collision as lacking discussion of causality: he asked for discussion of the nature of momentum. His own work was much influenced by ideas drawn from the De Corpore of Thomas Hobbes."

Neile was one of those who regarded the helter-skelter experimentation as no "philosophical" or scientific program at all, and causality as the key to producing an explanatory theory (the Grand Unifyied Theory of its time).

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