The Teacher's Assistant

Or, A System Of Practical Arithmetic: Wherein The Several Rules Of That Useful Science Are Illustrated By A Variety Of Examples, A Large Proportion Of Which Are... » 

Or, A System Of Practical Arithmetic: Wherein The Several Rules Of That Useful Science Are Illustrated By A Variety Of Examples, A Large Proportion Of Which Are In Federal Money : The Whole Designed To Abridge The Labour Of Teache «