366 Relation of Insolation to Atmospheric Humidity, [Feb. 14j 



No. 4. 



Vapour-Tension at 10** a.m. at Greenwich (1842-47). 



Year. 



March. 



April. 



May. 



June. 



July. 



August. 



Sept. 



Oct. 



1842. 



0-263 



0-255 



0-354 



0-453 



0-425 



0-527 



0-442 



0-285 



1843. 



0-260 



0-302 



0-383 



0-400 



0-467 



0-498 



0-461 



0-304 



1844. 



0-238 



0-320 



0-352 



0-412 



0-452 



0-423 



0-435 



0-330 



1845. 



0187 



0-282 



0-323 



0-467 



0-459 



0-432 



0-382 



0-349 



1846. 



0-261 



0-298 



0-361 



0-516 



0-491 



0-494 



0-465 



0-354 



1847. 



0-210 



0-248 



0-372 



0-377 



0-481 



0-465 



0-376 



0-375 



Sums 



1-419 



1-705 



2-145 



2-625 



2-775 



2-839 



2-561 



1-997 



Means * 



0-236 



0-284 



0-357 



0-437 



0-462 



0-473 



0-427 



0-333 



No. 5. 



Vapour-Tension at noon at Greenwich (1842-47). 



Year. 



March. 



April. 



May. 



June. 



July. 



August. 



Sept. 



Oct. 



1842. 



0-280 



0-270 



0-358 



0-470 



0-437 



0-546 



0-447 



0-315 



1843. 



0-271 



0-309 



0-390 



0-407 



0-493 



0-499 



0-478 



0-324 



1844. 



0-250 



0-337 



0-358 



0-423 



0-459 



0-429 



0-456 



0-343 



1845. 



0-190 



0-295 



0-331 



0-488 



0-462 



0-445 



0-397 



0-354 



1846. 



0-266 



0-305 



0-377 



0-498 



0-489 



0-491 



0-470 



0-356 



1847. 



0-219 



0-247 



0-375 



0-388 



0-476 



0-491 



0-396 



0-389 



Sums 



1-476 



1-763 



2-189 



2-674 



2-816 



2-901 



2-644 



2-081 



Means * 



0-246 



0-294 



0-365 



0-446 



0-469 



0-483 



0-441 



0-347 



No. 6. 



Vapour-Tension at 2^* p.m. at Greenwich (1842-47). 



Year. 



March. 



April. 



May. 



June. 



July. 



August. 



Sept. 



Oct. 



1842. 



0-284 



0-269 



0-355 



0-472 



0-435 



0-546 



0-447 



0-317 



1843. 



0-273 



0-318 



0-393 



0-419 



0-501 



0-508 



0-476 



0-324 



1844. 



0-253 



0-346 



0-370 



0-432 



0-470 



0-431 



0-453 



0-346 



1845. 



0-197 



0-292 



0-333 



0-496 



0-469 



0-445 



0-408 



0-346 



1846. 



0-271 



0-311 



0-379 



0-485 



0-488 



0-491 



0-473 



0-357 



1847. 



0-218 



0-245 



0-381 



0-392 



0-486 



0-496 



0-407 



0-381 



Sums 



1-496 



1-781 



2-211 



2-696 



2-849 



2-917 



2-664 



2-071 



Means * 



0-249 



0-297 



0-368 



0-449 



0-475 



0-486 



0-444 



0-345 



* The means are inserted in Table V. 



