| 22 | 23 | 24 | 25 | 26 |
| 1 | 306 | 613 | 919 | 1225 |
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between one time of writing and the next.
[Footnote: 1. In the history of Florence in the early part of the
XVIth century Piero di Braccio Martelli is frequently mentioned as
Commissario della Signoria. He was famous for his learning and at
his death left four books on Mathematics ready for the press; comp.
LITTA, Famiglie celebri Italiane, Famiglia Martelli di
Firenze.--In the Official Catalogue of MSS. in the Brit. Mus., New
Series Vol. I., where this passage is printed, Barto has been
wrongly given for Braccio.
2
. addi 22 di marzo 1508. The Christian era was computed in
Florence at that time from the Incarnation (Lady day, March 25th).
Hence this should be 1509 by our reckoning.
3
. racolto tratto di molte carte le quali io ho qui copiate. We
must suppose that Leonardo means that he has copied out his own MSS.
and not those of others. The first thirteen leaves of the MS. in the
Brit. Mus. are a fair copy of some notes on physics.]
Suggestions for the arrangement of MSS treating of particular
subjects.(5-8).
5
.
Of digging a canal. Put this in the Book of useful inventions and in
2
4
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