An Easy Mechanical Way to Divide the Nautical Meridian Line in Mercator's Projection; With an Account of the Relation of the Same Meridian Line to the Curva Catenaria. By J. Perks, M. A

Mercator, J. Perks
1714 Philosophical Transactions of the Royal Society of London  
doi:10.1098/rstl.1714.0038 fatcat:cbnrvm2gvvgbfgokcdoeoakx2y