Orton's lightning calculator and accountant's assistant
Subtitle: the shortest, simplest and most rapid method of computing numbers, adapted to every kind of business and within the comprehension of ecery one having the slightest knowledge of figures
By: by Hoy D. Orton.
Edition: Entirely new ed., with extensive modifications and improvements.
Publisher: Orton
Published: 1871
Place of publication: Philadelphia, Pa
Language: eng
Number of pages: 194
Subjects: Ready-reckoners.
Other titles: Lightning calculator and accountant's assistant