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Old 22nd Feb 2015, 01:22
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Join Date: Dec 2014
Location: 40nm east of BLL
Posts: 152
If the subject was a chandallier: Before electric light, those things was hanging in a crane mechanism to either lower to ground-level or rise to above loft-height where the candles or oil-lamps were lighted.
A chandallier in swing during this movement will change frequency remarkable enough to percieve it without time measuring. Once have had this experience, it's easy to compare two Chandalliers/pendulums side-by-side and start counting how many swings it demands to swing parallel again - quite like comparing Your cars turn signal with the one on the car in front of You: At some time they will blink at same moment whereafter they will differ for a time!

Last edited by Flybiker7000; 22nd Feb 2015 at 17:53.
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