in its scope and the wealth of detail it provides, this book is
an invaluable reference on slide rules, their makers, manufacturers,
and retailers. Covering the period from the instrument’s invention
in the early 17th century to the present day, this treatise illuminates
all aspects of slide rule design and production. The author includes
a staggering amount of information, all cross-referenced, on slide
rule models and their makers and manufacturers. In all, several
thousand slide rule descriptions are catalogued.