of Achromatic Object-Glasses. 221 
TABLE — Continued. 
Dispersive 
Ratios. 
1st Surface. 
4th Surface. 
Radius to 
indices 
1-524 
1-585 
Correction, 
Plate Index. 
Correction, 
Flint Index. 
Radius to 
Indices 
1-524 
1-585 
Correction, 
Plate Index. 
Correction, 
Flint Index. 
•645 
6-7291 
+ 5-74 
-f- 1-164 
13-6429 
-f- 115-58 
— - 62-58 
•646 
6-7296 
+ 5-71 
4 M82 
13-6285 
-f- 115-69 
— 62-71 
•647 
6*7301 
4- 5-69 
4- i'199 
13-6141 
-j- 115-70 
— 62-84 
•648 
6-7306 
-f 5-67 
4- 1-216 
13-5997 
-f- 115.81 
— 62-97 
•649 
6-7311 
4- 5-65 
4- 1-223 
13-5853 
-j- 11602 
— 63-10 
•650 
6-7316 
4- 6-63 
4“ 1-25 
13-5709 
-f 11614 
— 63-23 
•651 
6-7336 
4- 5-58 
4- 1-29 
13-5457 
-f 116-14 
— 63-47 
•652 
6-7356 
4- 5-53 
4- 1-32 
13-5205 
116-14 
— 63-71 
•653 
6-737 6 
4- 5-48 
4- 1-36 
13-4953 
116*14 
— 63-95 
I -654 
6-7396 
4- 5-44 
4- 1-39 
13-4701 
4- 116-14 
— 64-19 
•655 
6-7416 
4- 5-39 
4- 1-43 
13-4449 
4- 116-14 
— '64-44 
•656 
6-7436 
4- 5-35 
4- 1-46 
13-4197 
4- 116-14 
— 64-69 
•657 
6-7456 
4- 5-30 
4“ 1-50 
13-3945 
4- 116-14 
— 64-94 
•658 
6-7476 
4* 5-26 
4- 1-53 
13-3693 
+ 116-14 
— 6519 
•659 
6-7496 
4- 5-21 
4- 1-57 
13-3441 
4- 116-14 
— 65-44 
•660 
6-7516 
4- 5-17 
4- 1-60 
13-3189 
4- U6-14 
— 65-69 
•661 
6-7536 
4- 5-12 
4 1-64 
13-2937 
4- 116*14 
— 65-94 
•662 
6-7556 
4- 5-08 
4~ 1"68 
13-2685 
4- 116-14 
— 66-19 
•663 
6-7576 
-f 5-03 
+ 1-71 
13-2433 
-I- 116-14 
— 66-44 
•664 
6-7595 
4- 4-99 
4-1-74 
13-2185 
4- 116*14 
— 06-69 
•665 
6-7614 
4- 4-95 
4-1-78 
13.1912 
4- 116-14 
— 66-94 
•666 
6-7633 
4- 4-90 
4- 1-81 
13-1683 
-f 116-14 
— 67-19 
•667 
6-7652 
+ 4-86 
4- 1-85 
13-1433 
4- 116-14 
— 67-44 
.668 
6-7671 
4. 4-81 
4- 1-89 
13-1183 
4- 116-14 
— 67*69 
.669 
6-7690 
4- 4-77 
4-1*92 
13-0933 
4- 116-14 
— 67-94 
•670 
6-7709 
4-4-72 
4- 1-96 
13-0683 
4- 116-14 
— 68-19 
•671 
6-7728 
4- 4-68 
4- 1-99 
13 0433 
4- 116-14 
— 68-44 
•6 72 
6-7747 
4. 4-63 
4 2-03 
13-0183 
4- 116-14 
— 68-69 
•673 
6-7766 
4- 4-59 
4 2-06 
12-9933 
4-116-14 
— 68-94 
•674 
6-7785 
4 - 4-54 
4 2-09 
12-9683 
4- 116-14 
— 69-19 
•675 
6-7804 
4. 4-50 
4- 2 -13 
12-9431 
4- 116-14 
— 69-44 
•676 
6-7823 
4. 4*45 
42-17 
12-9179 
-j- 116-14 
— 69-69 
•677 
6-7842 
4 4.41 
4- 2-21 
12-8928 
4- 116-14 
— 69-94 
•678 
6-7861 
4 4-36 
4 2-25 
12-8677 
-1- 116*14 
— 70-19 
•679 
6-7880 
4 4-32 
4- 2-29 
12-8426 
4- 116-14 
— 70-44 
•680 
6-7899 
4 4-27 
4 2-33 
12*8175 
4- 116-14 
— 70-69 
•681 
6-7918 
4 4-23 
4-2-37 
12-7924 
4- 116-14 
— 70-94 
•682 
6-7937 
4 4-18 
42-41 
12-7673 
4_ 116-14 
— 7M9 
•683 
6-7956 
4 4-14 
4 2-45 
12-7423 
4_ 116-14 
— 71*44 
•684 
6-7975 
4 4-09 
4 2-49 
12-7171 
4- 116-14 
— 71-69 
•685 
6-7994 
4 4-05 
4- 2-53- 
12*6920 
4 _ 116*14 
— 71-94 
•686 
6-8013 
4 4-00 
4 2-57 
12-6669 
_j_ 116-14 
— 72-19 
•687 
6-8032 
4 3-96 
4 2-61 
12-6418 
4- 116-14 
— 72-44 
•688 
6-8051 
4 3-91 
4- 2-65 
12-6167 
4- 116-14 
— 72-69 
•689 
6-8070 
4 3 87 
42-70 
12-5916 
4- 116-14 
— 72-94. 
•690 
6-8089 
4 3-82 
4 2-74 
12 5665 
4- 116-14 
— 73-19 
•691 
6-8108 
4 3-78 
4 2-78 
12-5414 
116-14 
— 73-44 
•692 
6-8127 
4 3-73 
4 2 82 
12-5163 
4- 116-14 
— 73-69 
•693 
6-8146 
4 3-69 
+ 2-86 
12-4912 
4. 116-14 
— 73-94 
•694 
6-8165 
4 3-64 
4-2-90 
12-4661 
4- 116-14 
— 74-19 
•695 
6-8184 
4 3-60 
4 2-94 
12-4410 
+ 116-14 
— 74*44 
•696 
6-8203 
4- 3-55 
4 2-98 
12-4159 
4- 116*14 
— 74-69 
•697 
6-8222 
+ 3-51 
4 3-02 
12-3908 
116-14 
— 74-94 
•698 
6-8241 
4- 3-46 
4 3-06 
12-3657 
4- 116*14 
— 75-19 
•699 
6*8260 
4- 3-41 
43-09 
12-3406 
4. 116-14 
— 75-44 
•700 
6-8279 
4- 3-35 
4-3-12 
12-3154 
4- 116*14 
— 75-70 
