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A history of the navigator's sextant / by Charles H. Cotter.

The book of the sextant : with ancient and modern instruments of navigation / by A. J. Hughes.

Deviation and the deviascope : including the practice and theory of compass adjustment also a note on the gyro-compass / by Charles H. Brown.

Egytian astronomical texts : The Ramesside star clocks / by O. Heugebauer and Richard A. Parker.

The slide rule simplified, explained, and illustrated. Showing its wonderful powers of calculation, and its rapidity in solving all questions relative to mechanical trades. Designed especially for the instruction of young carpenters and joiners. By Robert Riddell.

How to work with the spectroscope : a manual of practical manipulation with spectroscopes of all kinds ... / by John Browning.