196 Transactions of the SoiUh African Philosophical Society. 



TABLE 43. 

 Mean Annual Mileage Components, 1898-1901. 



For the hour ending 



I 



II 



Ill 



IV 



V 



VI 



VII 



VIII 



IX 



X 



XI 



Noon 



XIII 



XIV 



XV 



XVI 



XVII 



XVIII. .. 



XIX 



XX 



XXI 



XXII 



XXIII. .. 

 Midnight 



Annual Mean 



+ 

 + 



+ 

 + 



272 



210 



169 



90 



23 



55 



226 



574 



981 



+ 1,282 

 + 1,347 

 + 1,256 

 + 1,058 



+ 

 + 

 + 



755 



450 

 116 

 181 

 833 

 425 

 487 

 489 

 438 

 390 

 357 



E. 



+ 4,237 



+ 813 

 + 775 

 + 773 

 + 770 

 + 757 

 + 743 

 + 738 

 + 546 

 + 238 



— 172 



— 549 



— 865 



— 1,095 



— 1,189 



— 1,200 



— 1,072 



— 808 



— 454 



— 10 

 + 312 

 + 524 



+ 

 + 

 + 



644 

 730 



789 



R. 



+ 1,738 



857 



808 



792 



775 



757 



744 



772 



792 



1,010 



1,293 



1,455 



1,524 



1,523 



1,408 



,284 

 ,124 

 828 

 563 

 425 

 578 

 716 

 779 

 828 

 857 



4,579 



341° 32' 

 344 52 

 347 39 



353 18 



358 14 



4 12 



17 3 



46 27 



76 22 



97 88 



112 11 



124 33 



135 59 



147 84 



159 25 



178 48 



192 82 



216 19 



268 37 



302 38 



316 57 



825 46 



831 56 



885 41 



67 45 



Increase of 



Wind Pressure 



at Station. 



— 38 



— 2 



— 3 



— 13 



— 14 



— 5 



— 192 



— 308 



— 410 



— 377 



— 816 



— 280 



— 94 



— 11 

 + 128 

 + 264 

 + 854 

 + 444 

 + 822 

 + 212 

 + 120 

 + 86 

 + 59 

 + 24 



TABLE 44. 



Some Harmonic Constants in the Diurnal Curve of Wind- 

 Velocity. 



32 . 



P3 ■ 



<l3 • 



Va ' 



(Z4 • 



V, . 



v.. 



V4. 



! V J M 



NAHOB 



"i • 

 M2 . 

 M3 . 



U. . 



Clear Days. Cloudy Days. 



+ 

 + 



+ 



•9123 

 •2718 

 •6373 

 •0281 

 •0628 

 •1683 

 •1000 

 •0577 



245° 55' 



77 31 

 137 2 

 269 59 



•952 

 •638 

 '180 

 •115 



— 1^9094 



— -2825 

 + ^6653 



— ^2238 

 + -1776 

 + -0721 



— -2500 

 + -0289 



254° 5' 

 98 85 

 45 24 



246 36 



1-980 

 •702 

 •192 

 •252 



All Days. 



+ 

 + 



+ 



1^5078 

 •2757 

 •6570 

 •1533 

 •1290 

 •0833 

 •2000 

 •0289 



252° 8' 

 88 8 

 71 12 



248 18 



1^584 

 •675 

 •129 

 •200 



Increase of 



Wind Pressure 



at Station. 



— 126-708 

 + 230^677 

 + 134^868 



— 93-647 

 5-801 

 6-191 



42-750 

 11-114 



+ 

 + 



+ 



381° 13' 



124 46 



43 9 



284 34 



263^153 

 164^173 



8^481 

 44-163 



