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PREFACE.
obſerving ſo to place the Plan below, and the Upright on one ſide of your neat Draught, that your Drawing-Square may command each of them; which will mightily ſhorten your Work.
V. That the Author's Advice of taking the Figures in courſe, be ſtrictly follow'd in the Practice; which will be a great means to render the Whole eaſy and pleaſant.
This is the Sum of what we thought moſt proper to advertiſe you; and have only this farther to requeſt, That if any Miſtakes may have eſcap'd the Preſs undiſcover'd, as we well hope there are few or none, you will favourably correct and pardon them.
MONITA
