I've realized two radiometric clocks 25 years ago, showing that a 25 watts lamp can move a 4 kg pendulum. Every features, mesures and facts can be found on my website: betrisey.ch under the ...
AN escapement in general is to be considered a good one just in proportion as it prevents variations of friction in the clock-train from reaching the pendulum.
Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...
NMAH copy 39088007807613 bound with: Instructions for erecting Riefler's astronomical clocks in air-tight glass cases / Clemens Riefler. [Munich? : C. Riefler, 189 ...
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