Elementos de Física ó de Filosifía natural, general y médica, escritos en inglés para uso de toda clase de personas (...) /

Contiene: Tomo I ; Tomo II ; Tomo III.

The Sumner line of position furnished ready to lay down upon the chart by means of tables of simultaneous hour angle and azimuth of celestial bodies. Latitude 60æ N. to 60æ S.--declination 27æ N. to 27æ S.

"The plan of arrangement and scope of these tables, as well as the method of using them in navigation, were conceived by Mr. G.W. Littehales, C.E. Hydrographic office, Washington D.C."--Pref., p.iii.