ox A TABLE OF STANDARD WAVE LENGTHS OF THE brECTKAL LLNL5 
12.^ 
9ob. 
G430.310 
7 
.317 
4293.240 
5 
.245 
Cob. 
6439.300 

o 
.320 
643L072 
20 
.092 
4203.232 
13 
.'245 
4ob. 
4823.699 
685 
.014 
4824.312 
312 
.000 
7233.927 
10 
.917 
7233.1 CG 
.ir,t] 
7210.072 
10 
. 9o-» 
TABLE IV. 
SIX-INCH CONCAVE GRATING. 21J FEET RADIUS 
7.218 linestto inch. — November, 1884. 
Seui 
I^_Gkating ts 
DlKECT. 
(1) t Sob 
4691.584 
Hence 
Observed h\ Rowlaml 
4090.328 
Qh - 
5 71 
5024.777 
23.137 
6024.265 
(2) I 6ob. 4508.455 4501.440 
Hence 
5624.763 5624.248 
5^ 
in 
13.550 
4497.013 4494.7;]0 
(3) 
8 ob. 
4222.382 
Hence 
5624.765 
4e- 
Sn 
5624.260 
2.552 
4215.GG1 
(4) 
Sob. 
4222.380 
Hence 
5624.765 
4e 
3« 
5624.268 
2.538 
(5) f 4ob. 6013.770 
Hence 
4508.473 6003.264 
3 (6003) - 
4501.414 
4^ z:. 10.275 
4215.665 
4497.050 
4491.718 
(6) I .8ob. 
4508.449 
Hence 
(7) I Sob. 
5405.977 
6^7 
bm 
Hence 
4501.440 
6750.394 
5397.338 
4497.040 
5.581; bm-is 
6322.910 
bp 
(yl 
6.709; Or^-is 
5270.499 
17.779 
O »M»(I 
4494.723 
(8) I 8 ob. 
Hence 
6322.910 
bp 
Gl 
5270.499 
17.779 
