John Hamilton Moore 
New Practical Navigator; Being a Complete Epitome of Navigation 
To Which Are Added, All the Tables Requisite for Determining the Latitude and Longitude at Sea

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. As whole Numbers increafe their value in tenfold proportion from the right hand to the left, f0 Decimals decreafe in the fame proportion from the left hand towards the right thus, 5 05 005 or thus, T15, rho: 70560.