III. Appendix to note, dated November 1873, on white lines in the solar spectrum

After detection of the white lines 1650 and 1658 (Kirchhoff's scale) at issoorie in November 1873, I discovered two other such lines before ving that station of observation, viz. 2009 and 2068 (about). On h November, 1873, I packed up the spectroscope, taking particular ce that the prisms should not shift from the position they then occupied. On 28th November, 1873, I set up the spectroscope in the Dome observatory at Dehra, in the valley below, the prisms retaining their mer position, and my recollection of the white lines seen at Mussoorie being still quite vivid.