Reid, in his treaties on clock and watch making observes that “Height or length of fall for the clock- weights and sounding-boards for the bells were much attended to when building spires for ancient churches. An instance of this is seen in Sir Christopher Wren’s architecture of the cathedral church of St. Paul’s, where the fall for the clock-weights allows of such a force as, by a stroke of a hammer, it can make a bell of 11,474 lbs. be heard at a distance of two-and-twenty miles. We heard it at Windsor in the month of June 1773. The day was still and calm; and attending to try if the clock could be heard when striking the twelve o’clock hour at noon (which we did hear), the sound which came through the air was not like that of a bell, but had a dull, low and feeble tone, barely perceivable.”

 (Wood’s Curiosities of Clocks and Watches)

Very much doubt whether you can hear St Pauls from Winsor today.

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