140 NUNNELEY, ON THE CRYSTALLINE LENS. 
SHEEP. 
: Radius of|Radius of 
Die | ani (oa 
1. 57 |°40 |-2892 |-3338 
2. 57 1°40 |-2892 |-3338 
3. “57 1°40 |:2892 |:3338 
4. 57 |°40 |:2892 |:3338 
is 60 |°40 |°38075 |°3612 
6. p . |°58 |°40 |°2952 |-3498 
Ager. age diameter of lens Fi 5766 
Average axis of lens . *4000 
Average radius of posterior curve 2932 
Average radius of anterior curve 3398 
HARE AND RABBIT. 
J. Hare , : ‘ . 1°46 1°37 1°2809 |°9453 
9. Ditto : , ‘ . 1°46 1°37 1°2809 | °2453 
3. Ditto, very large : : . 150 |38 | — — 
4,, Rabbit, rather ‘small ‘ 4 . {43 1°32 1-2184 |°2350 
5. Ditto, ditto 7 » 1:42 1539 | QOS 2275 
Average diameter of lens i 4.540 
Average axis of lens . *3520 
Average radius of posterior curve 2231 
Average radius of anterior curve "2382 
BIRDS.—COMMON FOWL AND DUCK. 
1. Very large cock, both eyes alike . » [32 |°22 |°1634 |:1872 
2. Ditto, ditto : . {27 [21 |:1850 |-1539 
DE Smaller cock, ditto : . {28 }:18 | — a 
4. Hen, ditto F . 1°26 1:17 Wls4ab essa 
5. Duck, ditto 5 . |°32 1:24 — ane, 
6. Ditto, ditto 2 . {26 |°20 |°13804 |°1456 
Average diameter of lens x *3850 
Average axis of lens . : 2033 
Average radius of posterior curve 1408 
Average radius of anterior curve “1606 
(Twelve lenses measured.) 
The lens of No. 2 was immersed in water at 
160° F. : » 1°26 | 23 11813 | 1456 
REPTILES. 
Alligator, both eyes alike . - . | 48 Ec _— | — 
Small frog, ditto ; . . |°20 | 16 0509 0532 
FISH. 
Cod, large, both eyes . : . 1°58 1-58 Equal. 
Haddock, ditto : : » |[°53, 1-63 | ise 
Holibut, ‘eft eye ; ; . |°52 |°52 Ditto. 
Ditto, right eye . 1°60. 1°50 Ditto. 
In this fish the right eye, in all its measure- 
ments, was smaller than the left, and it is a 
curious fact, that though the right lens was 
smaller than the left, yet its specific gravity was 
somewhat greater. 
