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Mr. J. Norman Lockyer. On the unknown
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W a re-len gth . (^) = determ ined by four-prism Steinheil. 5984 -o (s) 5991 -6 (s) 6000-0 6025 -0 6030 -0 6035 -0 6043-0 6047 -1 (*) 6060 0 6064 -0 6065- 7 (a) 6066- 1 (s) 6070 -0 (.?) 6071 -6 (s) 6080 -0 6090 -0 6098 -9 (a) 6105 -0 6110 -0 6112 -0 6114 -5 (.s) 6115 -9 (s) 6122 -43 (*) 6140 -0 (,?) 6141 -9 (a)
C h rom o sphere (Y o u n g ). 5991 -6 (10) 6065 -71 (5 ) 6111 -29 (2) 6 1 2 2 -4 3 (5) 6141 -93 (25)
