Two bells of equal weight but double size sound lower
A note linking bell proportion and size to pitch
A short text-only note, written in mirror script with no diagram, states a rule about the sound of bells. If two bells of the same proportion and the same weight are made, one double the size of the other, the larger will sound at 'double lowness' of tone. Leonardo links the geometric scale of a bell to the pitch of its voice.
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Size and pitch of bells of equal weight
Leonardo observes that of two bells kept in the same proportion and the same weight, but one twice the size of the other, the larger will be 'of double lowness of voice.' The remark ties a bell's dimensions to the depth of its tone. No drawing accompanies the note.