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Re: [Phys-L] astronomy activities

On 5/29/2019 2:02 PM, bernard cleyet wrote:
Another detailed instruction of ???high quality??? pendulum in here: https://www.amazon.com/Scientific-Americans-Amateur-Scientist-Science/dp/0970347626


bc visited the Panth??on where L??on second denonstrated his pendulum (across the courtyard from where he obtained a copy of his mother???s mariage certifitate [the 5th mayor???s office]); then an original version in the Mus???? des arts et M??tiers.

https://en.wikipedia.org/wiki/Mus??e_des_Arts_et_M??tiers
Excellent suggestion! This is Shawn's collection.
??I prefer the master's original collection by C.L Stong.

Brian W