Absorption on the Resolving Power of Prism Trains. 359 



In order better to show the transition between these two 

 extreme cases, the values of the function If have been com- 

 puted for six intermediate values of B as follows : — 



B6 = 0-5754, 

 B6= 1-3862, 

 B6 = 2-197'2, 

 B6 = 2-7726, 

 B6 = 4-6052, 

 and B&^r 7*825. 



In these computations the quantity io.z^H, whose value is 



determined simply by the intensity of illumination in the 

 incident wave-front and by the dimensions of the instrument, 



Table I. 



1 







I for different values of W> 







— a 



sin 2 # 



[2r ~- ^ 





a 









7-825. 



' < 



B6 = -5754. 



1-3862. i 



21972. 



2-7726. | 



4-6052. ; 



j 



000 



1-0000 



10000 



1-0000 



10000 



1-0000 j 



10000 



10000 



010- 



•9675 



•9681 



•9696 



•9739 



•9766 



•9862- 



•9925 



0-20tt 



•8751 



•8769 



•8870 | 



•8997 



•9100 



■9436 | 



•9745 



0%30tt 



•7368 



•7411 



•7598 



•7880 



■8114 



•8791 ! 



■9459 



04 7T 



•5754 



•5792 



•6086 



•6535 



•6900 



•7988 



•9079 



0-5 TT 



•4053 



•4138 



•4527 



•5132 



•562S 



■7102 



•8620 



0-6 it 



•2545 



•2646 



•3105 



•3826 



•4416 



•6207 



•8128 



07 7T 



•1353 



•1462 



•1955 



•2732 



•3313 



•5351 



•7599 



0-8 7T 



•0547 



•0654 



1140 



•1916 



•2558 



•4624 



•7079 



0-9 7T 



0119 



•0217 



0663 



•1382 



•1989 



•4003 



•6571 



10 IT 



•uooo 



0084 



0464 



•1089 



•1629 



•3494 



•6079 



1:1 7T 



•0080 



0146 



0452 



•0968 



1422 



•3087 



•5621 



1-2 7T 



0243 



•0292 



•0528 



•0935 



•1303 



•2752 



•5194 



1-3 ir 



•0392 



•0428 



0605 



•0923 



•1222 



•2477 



•4798 



1-4 -* 



•0468 



•0497 



01532 



•0886 



1139 



•2232 



•4432 



15 7T 



•0450 



0472 



•0587 



•0805 



1026 



•2008 



•4095 



1'6 7T 



•0358 



■0381 



0486 



•0686 



•0889 



•1798 



•3773 



1-7 7T 



•0229 



•0250 



•0358 



•0554 



0736 



1611 



•3495 



1-8 7T 



•0108 



•0130 



0239 



0434 



•0626 



144] 



•3233 



1-9 TT 



0027 



0049 



•0155 



0344 



•0529 



•1298 



•3002 



2-0 TV 



•oooo 



•0020 



0120 



0297 



0462 



•1182 



•2789 



2-2 7T 



■0072 









•0422 



•1011 



•2429 



2-4 7T 



•0159 









•0402 



•0885 



■2116 



2-6 7T 



0136 









0347 



0764 



1871 



2-8 7T 



•0045 









•0270 



•0651 



1655 



30 7T 



•oooo 









0210 



0562 



1470 



32 7T 













•049 



1317 



3-5 a- 













043 



•1169 



40 TT 















•0888 



5-0 7T 















•0582 



6-0 TT 















•0413 



2 B 2 



