Soule's Primary Philosophic Arithmetic

Embracing Mental And Written Arithmetical Exercises And Examples...Designed As A Supplement To Soule'S Philosophic, Commercial And Exchange Calculator And, As A... » 

Embracing Mental And Written Arithmetical Exercises And Examples...Designed As A Supplement To Soule'S Philosophic, Commercial And Exchange Calculator And, As An Introductory Work To The Science Of Numbers «