Bigelow — Radiation in the Earth) s Atmosphere. 261 



these tables shows that a generally decreases in value from 3*81 

 on the surface in the tropics to 3*79 on entering the isothermal 

 layer, when it changes quite steadily to about 3*76 at 16,000 

 meters ; the values of a increase from 3*81 to 3*83 in latitude 

 at the surface. In fact there are no fixed values of a and log 

 c in the atmosphere, though the range is not large. In order 

 to exhibit the general distribution of these quantities Table 9 

 contains approximate values of a for every 10 degrees in lati- 

 tude, and for every 1000 meters elevation computed from 

 the provisional mean summer temperatures of the northern 

 hemisphere. 



Table 7. — The coefficient log c in log c =log K ]0 -a log T 10 . 



z 



May 5 



1909 

 52° 



July 27 

 1908 

 52° 



Sept. 2 

 1909 

 52° 



Sept. 7 

 1906 

 45° 



Sept. 25 

 1907 

 35° 



Sept. 9 

 1907 

 25° 



Aug. 29 

 1907 

 13° 



July 29 

 1907 

 13° 



June 19 

 1906 

 -2° 



Victoria 

 Nyanza 



0° 



16000 

 15000 



-5-435 

 -5-461 



-5-433 



-5-458 



z 



-5-440 

 -5-449 



-5-445 

 -5-457 



-5-441 

 -5-470 



-5-492 

 -5-496 



-5-496 

 -5-499 



-5-499 



-5 456 

 -5-476 



14000 

 13000 

 12000 

 1L000 

 10000 



-5489 

 -5-537 

 -5563 

 -5-548 

 -5558 



-5-479 

 -5-506 

 -5-529 

 -5-541 

 -5-540 



-5-481 

 -5-490 

 -5-510 

 -5-537 



-5-474 

 -5-500 

 -5-515 

 -5-512 

 -5-502 



-5-479 

 -5-521 

 -5-525 

 -5-528 

 -5-518 



-5-487 

 -5-492 

 -5-516 

 -5-509 

 -5-503 



-5-494 

 -5-506 

 -5-507 

 -5-507 

 -5-509 



-5501 

 -5-528 

 -5-500 

 -5-515 

 -5-516 



-5-495 

 -5-498 

 -5504 

 -5-498 

 -5-491 



-5-467 

 -5-487 

 -5-486 

 -5-500 

 -5-502 



9000 

 8000 

 7000 

 6000 

 5000 



-5-558 

 -5-560 

 -5-557 

 -5-560 

 -5-547 



-5-551 

 -5-542 

 -5-544 

 -5-535 

 -5-537 



— 5-57L 



-5-566 

 -5-558 

 -5-563 

 -5-585 



-5-489 

 -5-499 

 -5 517 

 -5-518 

 -5-525 



-5-516 

 -5-526 

 -5-534 

 -5-541 

 -5-530 



-5-500 

 -5-503 

 -5-517 

 -5-526 

 -5-532 



-5-513 

 -5-521 

 -5-536 

 -5-527 

 -5-524 



-5-504 

 -5-519 

 -5-520 

 -5-509 

 -5-526 



-5-509 

 -5-493 

 -5-500 

 -5-514 

 -5-527 



-5-507 

 -5-514 

 -5-497 

 -5-511 

 -5-519 



4000 

 3000 

 2500 

 2000 

 1500 



-5-560 

 -5-567 

 -5-575 

 -5-589 

 -5-600 



-5-548 

 -5-555 

 -5-560 

 -5-560 

 -5-561 



-5-584 

 -5-585 

 -5-596 

 -5-606 

 -5-608 



-5-534 

 -5-536 

 -5-548 

 -5-518 

 -5-523 



-5540 

 -5-554 

 -5-562 

 -5-544 

 -5-555 



-5-544 

 -5-519 

 -5-526 

 -5-531 

 -5-539 



-5-538 

 -5-543 

 -5-544 

 -5-537 

 -5-546 



-5-527 

 -5-548 

 -5-534 

 -5-549 

 -5-553 



-5-515 

 -5-538 

 -5-540 

 -5-550 

 -5-559 



-5-529 

 -5-541 

 -5-527 

 -5-531 

 -5-532 



1000 



-5-593 



-5-576 



-5-561 



-5-534 



-5-563 



-5-544 



-5-546 



-5-551 



-5-563 



- 5-533 



Table 8. — The exponent a in K, = c T 10 a . 



16000 



3-762 



3-760 





3-763 



3-766 



3-764 



3-787 



3-789 





3-771 



15000 



3-773 



3-772 



- 



3-768 



3-772 



3-777 



3-789 



3-790 



3-790 



3-780 



14000 



3-786 



3-781 



_ 



3-779 



3-782 



3-785 



3-788 



3-792 



3-789 



3-776 



13000 



3-808 



3-793 



3-782 



3-791 



3-800 



3-787 



3-794 



3-803 



3-790 



3-785 



12000 



3-820 



3-804 



3-786 



3-798 



3-802 



3-798 



3-794 



3-791 



3-793 



3-784 



11000 



3-813 



3-810 



3 795 



3-796 



3-804 



3-795 



3-794 



3-798 



3-790 



3-791 



10000 



3817 



3-809 



3-808 



3-792 



3-799 



3-792 



3-795 



3-798 



3-787 



3-792 



9000 



3-817 



3-814 



3-823 



3-786 



3-798 



3-791 



3-797 



3-793 



3-795 



3-794 



8000 



3-818 



3-810 



3-821 



3-791 



3-803 



3-792 



3-800 



3 800 



3-788 



3-797 



7000 



3-817 



3-811 



3-817 



3-799 



3-806 



3-799 



3-807 



3-800 



3-791 



3-790 



6000 



3-818 



3-807 



3 820 



3-799 



3-810 



3-803 



3-803 



3-795 



3-797 



3-796 



5000 



3-812 



3-808 



3-830 



3-802 



3-804 



3-805 



3-802 



3-803 



3-803 



3-800 



4000 



3-818 



3-813 



3-829 



3-806 



3-809 



3-811 



3-808 



3-803 



3-798 



3-804 



3000 



3-821 



3-816 



3-830 



3-807 



3-815 



3-800 



3-810 



3-813 



3-808 



3-810 



2500 



3-827 



3-818 



3-834 



3-813 



3-819 



3-803 



3811 



3-806 



3-809 



3-803 



2000 



3-833 



3-818 



3-839 



3-799 



3-811 



3-805 



3-808 



3-813 



3-814 



3-805 



1500 



3-838 



3-818 



3-840 



3-801 



3-816 



3-809 



3-812 



3-815 



3-818 



3-805 



1000 



3-834 



3-826 



3-837 



3-806 



3-820 



3-811 



3-812 



3-814 



3*820 



3-806 



