510 
S 2. 
Milieu d'indice 1,3334 (eau à 21°) 
h 
8' 
8 
§2 
s 
+ 3°50' 
+ 30®50'30" 
+ 22037 ' 
- 26o37' 
+ 3«23' 
+ 3°40' 
+ 26°57'30" 
+ 49053 ' 
+ 23o 3' 
+ 2°47' 
- 4°50' 
+ 48°40' 
+ 43°34'30" 
+ 44°44'30" 
- 1°42' 
- 6<>80' 
+ 43o 4'30" 
+ 44043' 
+ 4°23’ 
- 6°10'30" 
- 11°50' 
+ 43°24'30" 
+ 40° 4' 
- 4<>49' 
- 10°37' 
- 16°50' 
+ 42°33'30" 
+ 9o23' 
- 7«27' 
- 15° 4' 
(minimum) - 23°48' 
+ 42°43' 
+ 9o 8' 
- 44o40' 
- 24o 0' 
- 26°50' 
+ 42016' 
+ 9°40' 
- 47»40' 
- 23°33' 
- 34°50' 
+ 12-37' 
+ 9°26' 
- 22°24' 
- 27o39' 
- 36°50' 
+ 43°44' 
+ 9o53' 
- 26«57' 
- 34o37' 
- 41°50' 
+ 14° 8' 
+ 40°33' 
- 31047' 
- 35°25' 
- 46°50' 
+ 45°48'30" 
+ 44o25' 
- 35o25' 
- 39° 4'30" 
- 48’50' 
+ 45°52'30" 
+ 44°50'30" 
- 36°59'30" 
- 40°24' 
- 56°50' 
+ 48°40' 
+ 13°53'30" 
- 42°56'30" 
- 45o34' 
- 84°50' 
+ 20°58'30" 
+ 45°35' 
- 46015' 
- 48o25' 
- 66o50' 
+ 23°47'30" 
+ 17037' 
- 49o43' 
- 50°57' 
- 70°50' 
+ 26°29' 
+ 49»33' 
- 51047' 
- 52°42'30" 
- 73o30' 
+ 28 f 47' 
+ 21°10'30" 
- 52°39'30" 
- 53o53' 
- 75°50' 
+ 30°34' 
+ 22°23'30" 
+ 53°26'30" 
- 54o34' 
§3. — Milieu d'indice 1,5315 (mélange de nitrobenzène 
et de toluène). 
Ô 1 
8 ' 
8 
^2 
£ 
+ 30°45' 
- 8oi0' 
- 5° 19' 
+ 24°56' 
+ 30«23' 
+ 23o45' 
- 7014 ' 
_ 4041 ' 
+ 18°34' 
+ 23°36' 
+- 
0 
CO 
- 5®35' 
- 3o39' 
+ 7°29' 
+ 44°27' 
- 30 15' 
- 3®52' 
- 2°31'30" 
- 5°46'30" 
- 3°20' 
- 17035' 
- 2° 5' 
- 4°24'30" 
- 49°46'30" 
- 48°46'30" 
- 32o45' 
Oo 0' 
O® 0' 
- 32°45' 
- 32®45' 
- 34°39' 
+ 0o48' 
+ 0°l2' 
- 34°27' 
- 34o32' 
- 47®36' 
+ 2°46' 
+ 1°48'30" 
- 45°47'3U" 
- 46° 8'30" 
- 62°23' 
+ 7o 6' 
+ 4®38' 
- 57o45' 
- 57°54'30" 
- 77®14' 
+ 45°27' 
+ 10° 1' 
- 67o43' 
- 66°47'30" 
- 83° 9' 
+ 24° 8' 
+ 43o37' 
- 69°32' 
- 68°56' 
- 86°11' 
+ 24®50' 
+ 45°55' 
- 70°46' 
- 69°37' 
Dans ce 
milieu, où 
la déviation 
extraordinaire 
du prisme 
