print. engraving. circular in four quartile segments, paper mounted on cloth with bound edges. Geometrical projection of two thirds of the [terrestrial] sphere by Col Sir H James RE, FRS, MRIA &c, Coeli, Besse, Tenus, Liceat Convexa Tueri, c1850, [features path of the pole due to precession considered as uniformly described in the period of 25800 years horologium 1850], 69 cm diameter