The construction of the wonderful canon of logarithms

Sev
ditissimo
per
promptvario.
;
132 Catalogue.
Rabdologise Nvmerationis per Virgulas libri duo :
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Cum
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Appendice de expe- 1 ditissimo Mvltiplicationis
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Quibus accessit & Arithme-|ticae Localis Liber unus.|Authore &
Inventore Ioanne|Nepero, Barone Merchisto-|nij, &c. Scoto.|
Lvgdvni.|Typis Petri Rammasenij. M. DC. XXVI.
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12°. Size BJ X 3i inches. +i^ Title. fi^, blank. t2M4", 6 pages, Dedication
to Alex. Seton, Lord Dunfermline. +5^, Verses. +S''-t6^ 3 pages,
Elenchvs Capitvm, with the 2 lines at end. A'-Bg", pp. 1-42, Rahdologia, Lib. I.
Bio^-D62, pp. 43-84, Lib. IT. D7^-E3^ pp. 85-102, Mult, promptuario. E4'-
G4^, pp. 103-139, Arith. Localis.
Signatures.
G4*-G6*, 5 pages, all blank.
\ in six-^ A to E in twelves -I- F and G in sixes=78 leaves.
Paging. 1 2 -I- 1 39 numbered 4- S
= 1 56 pages.
There are 9 folding diagrams to face pages 49, 51, 59, 81, 94, 97, 98, 115, and 117 j
those facing pages 94, 97, 98, and 117, correspond to the 4 folding plates of the 1617
edition, the others are tables which in 161 7 were printed in the text.
The numbering of the pages, though somewhat indistinct, seems to be correct
throughout. In printing the signatures, however, C7 is numbered in error C6, and
E3 has no signature printed.
This edition, published at Leyden, contains exactly the same matter
as that of the Edinburgh edition of 16 17. None of the plates, however,
are engraved on copper. The decimal fractions are printed according
to Simon Stevin's notation; thus, for example, on p. 41 we have 1994
rT), 90i06Qo(V) while in the 161 7 edition it is printed
/ // in ini
1994,9 160.
Libraries. Un. Ed.; Un. Ab. ; Un. St And.; Greenock; Bodl. Oxf.
Chetham's Manch.; Trin. Col. Dub.; Kon. Berlin; Un. Breslau ; Stadt.
Frankfurt; K. Hof u. Staats. Miinchen; Astor, New York;
Rabdologise Sev Nvmerationis Virgulas libri duo :
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Appendice de expe- 1 Mvltiplicationis promptvario.
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Quibus accessit & Arithmeti- cae Localis Liber vnus Authore
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& Inventore loanne Nepero Barone Merchisto- 1 nij, &c. Scoto.
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Lvgd. Batavorvm. Typis Petri Rammasenij. M.
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DC.
XXVIII.
I
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Cum
This