B chapter.indd - Charles Babbage Institute - University of Minnesota

Erwin Tomash Library
Brown, John Brown, John
and currency exchange. A small table of squares and
cubes appears, at first glance, to be for arbitrary values
but in fact demonstrates that to use the logarithmic scale
to find roots requires the user to appreciate the number of
digits being used (e.g., the cube root of 1728, 17576 and
175616 are easily confused).
Brown’s revision of White’s Use of the line of numbers
on a sliding (or Glasier’s) rule has its own separate title
page, but with continuous pagination.
Illustrations available:
Brown’s title page
White’s title page
Table of roots
Brown’s title, B 273
Table of roots, B 273
B 274
Brown, John (fl.1648–95)
Horologiographia: or the art of dyalling, being the
second book of the use of the trianguler-quadrant.
Shewing the natural, artificial, and instrumental way,
of making of sun dials, on any flat superficies: with
plain and easie directions, to discover their nature and
affections, by the horizontal projection. With the way
of drawing the usual ornaments on any plain: also, a
familiar easie way to draw those lines on the ceiling of
a room, by the trianguler quadrant. Also the use of the
same instrument in navigation; both for observation,
and operation. Performing the use of several seainstruments
still in use.
Year: 1671
Place: London
Publisher: Printed by John Darby for John Wingfield, also by
John Brown and John Seller
Edition: 1st
Language: English
Figures: 25 engraved plates pasted to text leaves
Binding: contemporary leather; spine gilt in compartments
Pagination: pp. 305, [7]
Collation: A–T 8 V 4
Size: 1413x90 mm
This is a very nice book on dialing. It manages to cover
almost every possible aspect of the subject and discusses
dials on all surfaces. Brown has added an appendix On
the use of the Triangular Quadrant in Navigation.
Illustrations available:
Title page
B 274
215