TYCHO'S TRIGONIC SEXTANT.

TYCHO'S ASTRONOMIC SEXTANT.

TYCHO'S EQUATORIAL ARMILLARY.

THE GREAT AUGSBURG QUADRANT.

TYCHO'S "NEW SCHEME OF THE TERRESTRIAL SYSTEM," 1577.

URANIBORG AND ITS GROUNDS.

GROUND-PLAN OF THE OBSERVATORY.

THE OBSERVATORY OF URANIBORG, ISLAND OF HVEN.

EFFIGY ON TYCHO'S TOMB AT PRAGUE.
By Permission of Messrs. A. & C. Black.

TYCHO'S MURAL QUADRANT, URANIBORG.

GALILEO'S PENDULUM.

GALILEO.

THE VILLA ARCETRI.

FACSIMILE SKETCH OF LUNAR SURFACE BY GALILEO.

CREST OF GALILEO'S FAMILY.