Page:Proceedings of the Royal Society of London Vol 60.djvu/428

396 and all the strong lines in the groups extending to 3441, corresponding to the solar line 0.

Manganese. Copper..... Gallium. . . . 40330 32900 4171-6 40320 3262-5 4032-7 Sodium. . . . 5893-0 5688-0 Chromium.. 4289-0 4274-0 Silver.. . . . . 3383-5 3282-1 Nickel. . . . . 35250 34150 4030-0 — — 46680 33030 — 4253-0 3606-0 3593-0 3578-0

The insoluble residue B contained iron, copper, sodium, and a trace of potassium. Iron.. . . . . Groups of lines lying between 4045'0 and 3440*0 Copper. . . Lines with wave-lengths. . . . 3290 0 „ 3262-5 Sodium... „. . . . 5893 0 ,,3 3 0 3 0 Potassium 40471 „ 4043*5

The metals precipitated by zinc, G. These were iron, copper, silver, a trace of lead, also some sodium and potassium. There was also a trace of chromium, and this, like the trace of iron, was probably precipitated as basic chloride or as hydroxide. The wave-lengths of the lines of iron, silver, and copper need not be recapitulated.

Lead .............. 4057 3682 and 3639 Chromium..................... 4289 4274 „ 4253

The metals precipitated by zinc after addition of lead acetate, F.— The metallic deposit yielded a complex spectrum containing the lines already mentioned of the following elements : iron, chromium, copper, silver, gallium (a trace'), potassium, sodium, and, of course, lead, as this had been added.

The lead here appears as a banded spectrum, the edges of the bands seen being those at wave-lengths:—

5675 5460 4980 4824 4657 4597 4370 4314 4225 4140 4061 4057 3985 and 3954 Nickel lines.. . . 3525 „ 3415

The copper lines were very strong, the silver weak. The potassium lines were the following:—

4047-1 4043*5 strong, then much fainter— 3447-5 and 3446-5