The Groundwork of Practical Naval Gunnery: A Study of the Principles and Practice of Exterior Ballistics, as Applied to Naval Gunnery and of the Computation and Use of Ballistic and Range Tables. E-book. Formato PDF Philip R. Alger   -  Forgotten Books, 2017  - 

The determination of the error of the setting of a sight for a given range; the adjustment of the sight to make the Shot fall at a given range; and the sight adjust ments necessary to make all the guns of a battery or ship Shoot together.