+------+------------+--------------------------------------------------+ |Screw.|Wave-length.| Remarks. | +------+------------+--------------------------------------------------+ | 3·84 | 6620 |}Several faint, broad, close lines, increasing in | | 4·85 | 6213 |} brilliancy as they approach the violet end. | | | | | | 5·30 | 6063 |}Broad bright lines, | | 5·51 | 6000 |} so close together | | 5·69 | 5948 |} that the intervening spaces appear | | 5·87 | 5896 |} like fine dark lines. This part of | | 6·04 | 5846 |} the spectrum is very bright, but | | 6·20 | 5802 |} not uniform, being brighter towards | | 6·43 | 5741 |} the violet end. | | | | | | 6·96 | 5607 |}Group of faint but at the same time | | 7·13 | 5567 |} very broad lines. The | | 7·28 | 5532 |} last is the brightest. | | | | | | 7·55 | 5470 |}The dark intervening spaces are somewhat broader,| | 7·74 | 5428 |} the bright lines somewhat more intense than | | 7·92 | 5389 |} in the preceding group, and all of almost equal | | 8·09 | 5353 |} brilliancy. | | | | | | 8·32 | 5306 |} | | 8·50 | 5272 |}Very faint fine lines. | | 8·69 | 5237 |} | | | | | | 9·01 | 5178 |Very bright broad misty line. | | | | | | 9·67 | 5066 |Very bright line. } | |10·25 | 4975 |” ” } | |10·66 | 4913 |” ” } The bright lines | |11·03 | 4862 |Very faint line. } are sharply | |11·41 | 4811 |Bright line. } defined towards | |12·11 | 4721 |” ” } the red end of | |12·57 | 4666 |Faint line. } the spectrum, | |12·57 | 4644 |Bright, broad, misty line. } fading away towards | |13·42 | 4570 |Very bright line. } the other end of | |14·24 | 4487 |” ” } the spectrum. | |15·02 | 4417 |Bright line.