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25 Oct 2021 [16:27]
swapped the 140g of weight to the end of the quarters release lever for 100g
25 Oct 2021 [16:17]
accidentally stopped the clock for 72 seconds while installing new spirit level. Corrected. The new level for measuring frame tilt has a sensitivity of o,1mrad/div. The Pendulum level has a sensitivity of 0.2mrad/div. The tower tilt level at ground level is 0.01mrad/div

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Interval between data points: seconds [either 3 seconds (weather data is duplicated) or multiples of 60 seconds (all data is averaged)].

[Raw data: Clock | Weather]

Contact:, Trinity College, Cambridge