MR. IVORY ON THE THEORY OF ASTRONOMICAL REFRACTIONS. 



227 



Table I. 



Mean Refractions for the Temperature 50° Fahrenheit, and the barometric Pressure 



30 inches. 



Zenith 

 dist. 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 42 

 43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 

 51 

 52 

 53 



It. 



1-02 



2-04 



3-06 



4-08 



5-11 



6-14 



7-17 



8-21 



9-25 



10-30 



11-35 



12-42 



13-49 



14-57 



15-65 



16-75 



17-86 



18-98 



20-11 



21-26 



22-42 



23-60 



24-80 



26-01 



27-24 



28-49 



29-75 



31-05 



32-38 



33-72 



35-09 



36-49 



37-93 



39-39 



40-89 



42-42 



44-00 



45-61 



47-27 



48-99 



50-75 



52-57 



54-43 



56-35 



58-36 



0-43 



2-57 



4-80 



7-11 



9-52 



12-02 



14-64 



17-38 



Log S t. 



0-0085 



0-3097 



0-4860 



0-6112 



0-7086 



0-7882 



0-8557 



0-9144 



0-9663 



1-0129 



1-0553 



1-0941 



1-1300 



1-1634 



1-1 ^"47 



1-2241 



1-2519 



1-2784 



1-3036 



1-3277 



1-3507 



1-3729 



1-3944 



1-4151 



1-4352 



1-4547 



1-4736 



1-4921 



1-5102 



1-5279 



1-5452 



1-5622 



1-5790 



1-5954 



1-6115 



1-6276 



1-6435 



1-6591 



1-6746 



1-6901 



1-7055 



1-7207 



1-7358 



1-7510 



1-76611 



1-78123 



1-79637 



1-81155 



1-82678 



1-84208 



1-85747 



1-87298 



1-88863 



Diff. 



3012 

 1763 

 1252 

 974 

 796 

 675 

 587 

 519 

 466 

 424 

 388 

 359 

 334 

 313 

 294 

 278 

 265 

 252 

 241 

 230 

 222 

 215 

 207 

 201 

 195 

 189 

 185 

 181 

 177 

 173 

 170 

 168 

 164 

 162 

 160 

 159 

 156 

 155 

 155 

 154 

 152 

 151 

 152 

 151 

 1512 

 1514 

 1518 

 1523 

 1530 

 1539 

 1551 

 1565 



C. 



Zenith 

 dist. 



53 

 54 

 55 

 56 

 57 

 58 

 59 

 60 

 61 

 62 

 63 

 64 

 65 

 66 

 67 

 68 

 69 



70 00 

 10 

 20 

 30 

 40 

 50 



71 00 

 10 

 20 

 30 

 40 

 50 



72 00 

 10 

 20 

 30 

 40 

 50 



73 00 

 10 

 20 

 30 

 40 

 50 



74 00 

 10 

 20 

 30 

 40 

 50 



75 00 

 10 

 20 

 30 

 40 

 50 



it. 



17-38 

 20-24 

 23-25 

 26-41 

 29-73 

 33-23 

 36-93 

 40-85 

 45-01 

 49-44 

 54-17 

 59-23 

 4-65 

 10-48 

 16-78 

 23-61 

 31-04 

 39-16 

 40-59 

 42-04 

 43-52 

 45-02 

 46-53 

 48-08 

 49-65 

 51-25 

 52-87 

 54-53 

 56-21 

 57-92 

 59-66 

 1-43 

 3-23 

 5-06 

 6-93 

 8-83 



10-77 

 12-74 

 14-75 

 16-80 

 18-88 

 21-01 

 23-18 

 25-39 

 27-66 

 29-95 

 32-30 

 34-70 

 37-16 

 39-65 

 42-21 

 44-82 

 47-48 



Log i t. 



1-88863 



1-90440 



1-92036 



1-93653 



1-95291 



1-96955 



1-98646 



2-00368 



2-02124 



2-03918 



2-05754 



2-07635 



2-09567 



2-11555 



2-13603 



2-15719 



2-17910 



2-20186 



2-20573 



2-20963 



2-21356 



2-21752 



2-22150 



2-22552 



2-22956 



2-23363 



2-23773 



2-24186 



2-24603 



2-25022 



2-25445 



2-25870 



2-26299 



2-26732 



2-27 168 



2-27608 



2-28051 



2-28498 



2-28948 



2-29402 



2-29860 



2-30322 



2-30789 



2-31259 



2-31734 



2-32213 



2-32696 



2-33184 



2-33677 



2-34174 



2-34676 



2-35183 



2-35695 



Diff. 



1577 



1596 



1617 



1638 



1664 



1691 



1722 



1756 



1794 



1836 



1881 



1932 



1988 



2048 



2116 



2191 



2275 



388 



390 



393 



396 



398 



402 



404 



407 



410 



413 



417 



419 



423 



425 



429 



433 



436 



440 



443 



447 



450 



454 



458 



462 



467 



470 



475 



479 



483 



488 



493 



497 



502 



607 



612 



2 g2 



