Thursday 17 December 1668

Up, and set my man Gibson and Mr. Fists to work to write it over fair, while I all the morning at the office sitting. At noon home to them, and all the afternoon looking over them and examining with W. Hewer, and so about to at night I to bed, leaving them to finish the writing it fair, which they did by sitting up most of the night, and so home to bed.

6 Annotations

First Reading

Terry Foreman  •  Link

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

Dec: 17. - there was made an Expt. in prosecution of the notion That Springinesse is the cause of Rebounding. vizt a Woode globe was let fall against wood, a gutt string & a brasse wire in the first case the Rebounding was Languid, & of a very short Duration: in the 2d. it was much stronger, and more Durable, in the Last strongest and most Durable of all. which was conceiued to proceed from the differing degrees of the force of the Spring in the seuerall bodys employed.

The Curator took occasion to mention that he thought the air next to quicksilver gaue the quickest & most forcible reflection; and that the sparkling of Diamants in Rings proceeded from the air Left behind the stones.

Dr. Wrens theory of the Collision of Bodys produced &c. --

The curator was orderd to take care tht the Expts. be made before the Society, to verify the seuerall cases relating to the theory produced -- mr Hooke was Desired to bring in what [end of text here]…

Terry Foreman  •  Link


The Lords Commissioners of the Treasury being informed ly His Majesties Grand Commiffioners of Excise sitting in Aldersgate-street London, that notwithstanding due publication is made by them from time so time, what Tallies are paying in course upon the Countrey Excise; yet that several persons have neglected to bring in their Tallies and receive their Moneys due thereupon, though ready, to His Majesties great prejudice: Their Lordships have thought fit to order, and do hereby publifh that such as have, or shall neglect to bring in their T allies, and take their Moneys in their course, when the fame is ready for them, that they shall have no Interest allowed for the fame, any longer than to that time that the fame was ready and remained in Cafh for them.…

Terry Foreman  •  Link

L&M transcribe "about 10 at night" as Pepys's bedtime.

Robert Gertz  •  Link

Truly a Team Pepys effort to protect the office...Hope he gave Gibson and Fists the next morning off at least...

ONeville  •  Link

Mr Fists seems to be a good chap to have on your side.

Second Reading

Terry Foreman  •  Link

The Royal Society today at Arundel House "there was made an Expt. in prosecution of the notion That Springinesse is the cause of Rebounding."

Progress on the way to the publication of Hooke's Law.

Hooke's law is a law of physics that states that the force (F) needed to extend or compress a spring by some distance (x) scales linearly with respect to that distance...; The law is named after 17th-century British physicist Robert Hooke. He first stated the law in 1676 as a Latin anagram.[1][2] He published the solution of his anagram in 1678[3] as: ut tensio, sic vis ("as the extension, so the force" or "the extension is proportional to the force"). Hooke states in the 1678 work that he was aware of the law already in 1660.....

Hooke's law is an accurate approximation for most solid bodies, as long as the forces and deformations are small enough. For this reason, Hooke's law is extensively used in all branches of science and engineering, and is the foundation of many disciplines such as seismology, molecular mechanics and acoustics. It is also the fundamental principle behind the spring scale, the manometer, and the balance wheel of the mechanical clock.…

Lectures de potentia restitutiva, or, Of spring explaining the power of springing bodies : to which are added some collections viz. a description of Dr. Pappins wind-fountain and force-pump, Mr. Young's observation concerning natural fountains, some other considerations concerning that subject, Captain Sturmy's remarks of a subterraneous cave and cistern, Mr. G.T. observations made on the Pike of Teneriff, 1674, some reflections and conjectures occasioned thereupon, a relation of a late eruption in the Isle of Palma / by Robert Hooke ...
Hooke, Robert, 1635-1703., Papin, Denis, 1647-1714., Young, James., Sturmy, Samuel, 1633-1669., G. T.
London: Printed for John Martyn ..., 1678.
Early English Books Online [full text]…

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