} | | | | | |15·66 | 4363 |Bright lines. } Bright lines sharply defined | |15·72 | 4357 | ” } towards red end, indistinct | |15·87 | 4345 |Bright line. } towards other end of | |16·72 | 4273 | ” } spectrum. | +------+------------+--------------------------------------------------+ Here follow several lines. _b._ In the wide part of the tube. +-------+------------+------------------------------+ | Screw.|Wave-length.| Remarks. | +-------+------------+------------------------------+ | 6·20 | 5802 |Faint, indistinct, broad line.| | 7·72 | 5433 |Dull stripe. | | 8·20 | 5330 |Faint line. | | 8·94 | 5191 |Very faint line. | | 9·03 | 5175 |Broad band of light. | | 9·90 | 5029 |Dull band of light. | | 10·68 | 4911 |Moderately bright line. | | 11·42 | 4809 |Faint line. | | 12·59 | 4663 |Bright line. | | 13·43 | 4569 | ” | | 14·07 | 4504 |Moderately bright line. | | 14·25 | 4486 |Very bright line. | | 15·85 | 4347 | ” ” | | 16·76 | 4273 |Moderately bright line. | +-------+------------+------------------------------+ _c._ At the aura of the negative pole.