Henry Kater's telescope mb-height 2956 Crowded vista showing carriages entering

Crowded vista showing carriages entering the gates of Buckingham Palace while crowds in St James's Park promenade in the foreground watching the carriages arrive

Equestrian Portrait of Philip IV of Spain

with a peach-coloured robe

Two views of the tower of St Antholin

Inscribed below 'A

Henry Kater's telescope mb-height 2956 Crowded vista showing carriages enteringTelescope used by Henry Kater for pendulum observations. Geodesist and metrologist Henry Kater (1777 1835) invented Kater's pendulum in 1817 which enabled the strength of gravity to be determined. This sight was used to view the pendulum during observations in order to avoid parallax error. ca. 1820