APERTURE TABLE— continued. 



Corresponding ADgle (2 u) for 



I Limit of Kesolving Power, in Lines to an Inch 



Air 



(» = l-00). 



Water \Bomogeneous 

 (n = l-33). (n = l-52). 



69° 49' 

 68° 54' 

 68° 0' 

 67° 6' 

 66° 12' 

 65° 18' 

 64° 24' 



63° 

 62° 

 61° 

 60° 

 60° 

 59° 

 58° 

 57° 



31' 

 38' 

 45' 

 52' 

 0' 

 8' 

 16' 

 24' 



56° 32' 

 55° 41' 

 54° 50' 

 53° 59' 

 53° 9' 

 52° 18' 

 51° 28' 

 50° 38' 

 49° 48' 

 48° 58' 

 48° 9' 

 47° 19' 

 46° 30' 

 45° 40' 

 44° 51' 

 44° 2' 

 43° 14' 

 42° 25' 

 41° 37' 

 40° 48' 

 40° 0' 

 39° 12' 

 38° 24' 

 36° 49' 

 35° 15' 

 34° 27' 

 33° 40' 



White Light. 



(A. = 0-5269jUt, 



Line K.) 



Monochromatic 



(Blue) Light. 



(A. = 0-4861 it, 



Line F.) 



32° 

 30° 

 28° 

 27° 24 

 26° 38 

 25° 51 

 24° 18 

 22° 46 

 21° 14 

 19' 

 IS 1 

 18 

 16 

 15 



m 



12 



11° 19' 



10° 34' 



9° 4' 



7° 34' 



6° 3' 



4° 32' 



3° 46' 



5' 



81' 

 57' 



42' 

 56' 

 10' 

 38' 



7' 

 36' 



5' 



83,877 

 82,913 

 81,949 

 80,984 

 80,020 

 79,056 

 78,092 

 77,128 

 76,164 

 75,200 

 74,236 

 73,272 

 72,308 

 71,343 

 70,379 

 69,415 

 68,451 

 67,487 

 66,523 

 65,559 

 64,595 

 63,631 

 62,667 

 61,702 

 60,738 

 59,774 

 58,810 

 57,846 

 56,881 

 55,918 

 54,954 

 53,990 

 53,026 

 52,061 

 51,097 

 50,133 

 49,169 

 48,205 

 46,277 

 44,349 

 43,385 

 42,420 

 40,492 

 38,564 

 36,636 

 34,708 

 33,744 

 32,779 

 30,851 

 28,923 

 26,995 

 25,067 

 24,103 

 23,138 

 21,210 

 19,282 

 17,354 

 15,426 

 14,462 

 13,498 

 11,570 

 9.611 

 7,713 

 5,785 

 4,821 



90,918 

 89,873 

 88,828 

 87,783 

 86,738 

 85,693 

 84,648 

 83,603 

 82,558 

 81,513 

 80,468 

 79,423 

 78,37S 

 77,333 

 76,288 

 75,242 

 74,197 

 73,152 

 72,107 

 71,062 

 70,017 

 68,972 

 67,927 

 66,882 

 65,837 

 64,792 

 63,747 

 62,702 

 61,657 

 60,612 

 59,567 

 58,522 

 57,477 

 56,432 

 55,387 

 54,342 

 53,297 

 52,252 

 50,162 

 48,072 

 47,026 

 45,981 

 43,891 

 41,801 

 39,711 

 37,621 

 36,576 

 35,531 

 33,441 

 31,351 

 29,261 

 27,171 

 26,126 

 25,081 

 22,991 

 20,901 

 18,811 

 16,721 

 15,676 

 14,630 

 12,540 

 10,450 

 8,360 

 6,270 

 5,225 



Photography. 

 (A. = 0-4000^ 

 near Line h.)' 



Illuminating 

 Power 



110,488 

 109,218 

 107,948 

 106,678 

 105,408 

 104,138 

 102,868 

 101,598 

 100,328 

 99,058 

 97,788 

 96,518 

 95,248 

 93,979 

 92,709 

 91,439 

 90,169 

 88,899 

 87,629 

 86,359 

 85,0S9 

 83,819 

 82,549 

 81,279 

 80,009 

 78,739 

 77,469 

 76,199 

 74,929 

 73,659 

 72,389 

 71,119 

 69,849 

 68,579 

 67,309 

 66,039 

 64,769 

 63,499 

 60,959 

 58,419 

 57,149 

 55,879 

 53,339 

 50,799 

 48,259 

 45,719 

 44,449 

 43,179 

 40,639 

 38,099 

 35,559 

 33,019 

 31,749 

 30,479 

 27,940 

 25,400 

 22,860 

 20,320 

 19,050 

 17,780 

 15,240 

 12,700 

 10,160 

 7,620 

 6,350 



