Four Mahogany Mounted Hand Cranked Coloured Astronomy Hand Cranked Rotary Magic Lantern Slides, scenes of The spring and neap tides Illustrating the Influence of the sun and moon on the waters of the earth, Day and Night produced by the Diurnal Revolution of the earth on its axis, with crack to lower glass, the apparent direct and retrograde motion of Venus or Mercury and its stationary appearance and one originally showing a comet approaching and receding from the sun in an elliptical orbit, no image glasses & only partial mechanism in the mahogany holder, auction records show this lot was part of the Harry Bland collection auctioned at S.A.S. in 2015