of Chromatic Dispersion. 
371 
TasieE [].—Internal Wave-lengths calculated from the observed 
Indices (corrected by the laws of extrusion) per formula a = 
Media in same order as in Table I. 
uU. 
U 
F. G. 
0°704210|0°623398 
Sf. 9: 
0°526556|0°464874 
0°526387|0°464774 
0°52.6399|0"464785 
0°526087|0°464217 
0°522954|0°461742 
0°524880|0°463389 
0°522140|0°460820 
0°522956]0°461635 
0°52171510°460480 
0°520346/0'4 58853 
0°52148310°460412 
0°520548]0"4.59462 
0°518755|0°457808 
0°514172/0°453941 
0°510039|0"4.50172 
0°499724/0°440408 
0°499475|0°440564 
0°497310|0°438485 
0°500120|0°44.1319 
0°498254|0°439598 
0°4.98839|0"440191 
0°489035|0°431716 
0°4.7 5260|0°4 18894 
0°4.72402|0°4.17128 
0°43 1660|0°374976 
0°4.55858|0"400255 
0°448342|0°392543 
0°439499)/0°373941 
0°447317|0°391778 
0°429685|0°373337 
0°447601\0°392049 
0'4.53890|0°398617 
0°4.589670°404828 
0°458455|0°4043 69 
0°4.5312610°399052 
0°458829]0°405118 
0°4.54446]0°401105 
0°42§376}0°37 1092 
0°44947 5|0°396177 
0°4.51735|0°398694 
0°4.34.68710°382272 
0°42849110°376583 
0°427629]0°375801 
0°42.763 5}0°375802 
0°523112|0°461814) 
H. Sum. 
0°§70655)5°4.72782 
h. 
4°098664 
4°097612 
4°097618 
4095055 
4°073657 
4085576 
47065416 
4°072163 
4°07 1064 
4°060673 
4°050599 
4°059281 
47052522 
147038520 
0°4.14689|47002338 
0°4.11016|3°970379 
0°401700|3°892230 
0°4.02152|3°889875 
0°4.00158)3°874598 
0°4.02900|3°894098 
0°401273)/3°381143 
0°401898/3°88 5003 
0°394.561/3°807 501 
0°381996|3°702204 
0°380995/3°676543 
0°335976/3°377426 
0°363636/3°555305 
0°355482)3°500538 
0°335186/3°368104 
0°354796)3°4927 36 
0°334.911/3°362418 
0°355194/3°494544 
0°362343/3° 540926 
0°369431/3°574162 
0°368982)3°570336 
0°363684)3°531382 
0°370026/3°571179 
0°366227|3°538002 
0°335285|3°327914 
0°361295/3°501395 
0°364007|3°517132 
0°347881/3°389580 
0°342515 3°342311 
0°341775|3°335819 
0°341774/3°335827 
0°424688 
07424538 
0°42.4 543 
O'424337 
0°421645 
0°42.33%5 
0°420837 
0°421830 
O°421741 
O°420495 
O4-19351 
0°4.20527 
0°419600 
0°4 18062 
+++-10°6143.45)0°58 5325105235 7210'4 6 562110°42724 510°37 54.76/0°34.1492| 3°33 3076 
0°621736|0°592738|0°531186|0"473 564/0°43 5 504|0°384457]0°3 5 1086|3°390271 
0°620925|0°591966|0°5 30494 |0°4729 16|0°4 349 39|0°383.960|0°3 50654] 3°385854 
0°6 1808 5|0°58926 110°52807310°4 7076310°4 329 61|0°38217 110° 349003|3°370317 
Media .........| . B. Cc. D. E. 
SPBCE,.geeeeceee: 1°000000]0"9 53893/0°8 56059/0°764.567 
b. c. d. e. 
trate of bismuth ...|0°751542|0°716406|0°642103|0°572495 
ater (1), T.18°°75....|0°7513 50|0°7 1629 1/0°641927/0°57234.5 
er (2),T.18*75....|0°751328|0°7 16293)/0°64192710°572343 
ter, T. 1578 2 wee 0°75092010°715815|0°641571|0°572108 
ariate of zinc ...... 0°74.9008|0°711755/0°637850\0°568703 
bacetate of lead. ...|0°749064)0"714153/0°640121|0"5 706 54 
rate of mercury....|0°745825/0°7 1085 3/0°636996|0"567945 
Iphate of soda...... 0°74673410°711941|0°637943|0'568789 
ariate of baryta ...../0°74.6378)/0°711546)/0°637848|0"568960 
acetate of lead..|o°744657)0°709901|0°636238\0°567187 
trate of potash ......!0°74.3 108]0"708266]0°6 3475 1|0°565924 
phate of magnesia.|0°744380|0°709637|0°63 5907|0°566935 
trate of lead ...... 0°74.3216|0°708630\0°634973]0"566093 
ariate of ammonia.. 9°740796|0"706 169 0°632758)|0"S564172 
cohol, T. 17°°6......|0°733783|0°699693/0°626965)/0"5 59095 
Toligneous acid..,....]0°728385|0°693994|0°622136)0°5 54637 
ric acid ..... aedaan 0°714899|0°68 14. 50|0°6 103 36|0°543713 
iriate of lime ...... 0°713980|0°680574|0°609728)0°5434.02 
Iriatic acid ......... 0°7 11737|0°678449|0°607368)0"54. 1091 
L-potash,T.21°"5....|0°714475|0°631102|0°610248|0°543934 
ation of soda ....,. 0°7124.58|0°679464)0°608197|0'54.1899 
1. potash, T. 16°....|0°713063]0°679605|0°608817\0'542590 
Iphuric acid.........]0°698275|0°665708|0"596515|0"5 31691 
of turpentine...... 0°680043|0°648233|0°580602|0"517176 
le-spar ex. ray...... 0°67 3900|0°642569|0°575966|075 13583 
i of cassia, T.22°°5..|0°629128/0°598803|0°5 34.16910°472714 
lof sassafras ...... 0°65543810°624480]0°5 58749|0'496889 
1 of anise, T. 20°*9..|0°647207|0°616489|0°5 51087|0°489388 
‘of cassia, T. 14°....|0°627156|0°596967|0°532607|0'471748 
‘ofanise, T. 15°*1....|0°645744|0°615098|0°54.9742|0°488261 
if cassia, T. 10°....)0°62644.9|0°59592210°531582|0'470532 
of anise, T.13°*25..10°645912/0°615257|0°549990|0°488541 
COSOLE «4. .4 +00 0000e- 0°65274210°622037|0°5564.97\0°494800 
DWn-glass No. 13...|0°6 56034\0°625381|0°560254|0"499267 
on n-glass No. 9 ,..|0°655380|0°624746|0'5 59667|0°498737 
Ck-salt ........+4+...|0-64.9222/0°618808|0°5 54.160|0"493330 
Tagonite, 1st axis....|0°6 5466 5\0°624194|0°5 59479|0°498868 
artz O. ray ......... 0°64897 1\0°618688]0"55437110'494194 
sulphide of carbon..\o"61797 1/0" 58813 3/0"524932|0°465125 
Own-glass M ....../0°643180)0°613070/0" 54908 1|0"489117 
lat eX. Tay......... 0°645203/0°615098!0°551123|0°491272 
nt-glass No. 3 ...... 0°624203/0°594771|0°532211|0°473553 
int-glass No. 30 ....|0°615927\0"586839|0°525001|0°466955 
nt-glass No. 23(2)..|0°6 14793}0°585767 0°52401010°466044 
t-glass No. 23(1)..|0°614781)0°58576210°524011|0"466062 
nt-glass 0. 13 
paz, 2nd axis ...... 
“paz, 3rd axis ...... 
spaz, 1st axis ...... 
Me-spar O. ray ...... 0°604925 
fragonite, 3rd axis... 0°596552| 
onite, 2ndaxis 
0°576545|0°5 16164|0°4.59589|0"422189|0°371911|0°3 39009) 3°2903 32 
0°568 53810" 50907 3]0°43 3402/0°4.16 569|0°367050/0°3 34675/3°245859 
++10°59 §026|0°56712010°50777610°4 52193|0°4.15439|0°366016]0°3 33697|3'237267 
