Tuesday, 28 April 2009
Friday April 27, 1894
Point House Club dinner to Prof. Turner. Found in the morning that bearing pieces of crown cell of 28in O.G. in reversed posn had slipped. Turned it to visual posn & brought it down on the fixed bearing pieces in that posn placing two thicknesses of cartridge paper between slotted bearing pieces & the glass. This slipping of the lens would account for anomalies in the photos.
William Christie, Astronomer Royal
RH says..... Further fiddling with the various pieces of the 28-inch reversible lens - and a wonderful improvised solution!