284 



DE. CHARLES CHREE: SOME PHENOMENA OF 



Diurnal Inequalities from Disturbed Days. 



9. Tables VI. to IX. give the regular diurnal inequalities derived from the 20.9 

 disturbed days the curves being measured unsmoothed at the exact hours as 

 in (C) after eliminating the non-cyclic change in the usual way. These non- 

 cyclic changes were much smaller for V than for H, so that any uncertainty arising 

 from the method of elimination is presumably much less for the former element than 

 the latter. The same temperature corrections were applied as in the case of the 

 quiet days in (A). To avoid decimals O'ly has been taken as the unit, following the 

 example afforded by (A). The algebraically largest and smallest hourly values are in 

 heavy type ; their difference is taken as the range of the inequality. By the 



TABLE VII. Diurnal Inequality of Vertical Force (Unit O'ly). 



Forenoon. 



Hour 



January 



February , -401 



March . . . j -156 



April -155 



May -320 



June 240 



July -198 



August 44 I - 98 



September -148 -226 



October -108 ' -119 



November 224 



December 47 



-343 

 -235 



-148 

 -327 

 -291 

 -299 



-845 



- 97 



-308 

 -222 

 -149 

 -255 

 -297 

 -426 

 -170 

 -208 

 -119 

 -241 

 -166 



-312 

 -197 

 -189 

 -336 

 -218 

 -530 

 -413 

 -302 

 -121 

 -209 

 -120 



-243 



-197 

 -178 

 -324 

 -229 

 -584 

 -540 

 -200 

 -104 

 -184 



-219 

 -197 

 -174 

 -272 

 -265 

 -451 

 -577 

 -152 

 - 98 

 -160 

 -110 



-187 

 -140 

 -149 

 -231 

 -258 

 -332 

 -365 



- 94 



- 77 

 -139 



-156 

 -116 

 -150 

 -210 

 -292 

 -254 

 -210 



- 81 



- 77 

 -120 



- 77 



-127 

 -116 

 -177 

 -241 

 -274 

 -203 

 -139 



- 91 



- 79 



- 83 



- 78 



-124 



-119 

 -189 

 -248 

 269 

 -195 



- 82 



- 45 



- 99 



- 77 

 -123 

 -199 

 -218 

 -138 

 -184 



- 4 



- 82 

 -102 



- 44 



- 87 



- 44 



- 94 

 -157 

 -143 



- 63 

 -126 



- 2 



- 52 

 -.63 



- 13 



- 72 



Afternoon. 



Hour . 



10. 



11. 



12. 



Range. 



Average 



departure 



from the 



mean. 



January. . 

 February . 

 March . . 

 April . . . 

 May . . . 

 June . . . 

 July . . . 

 August . . 

 September . 

 October . . 

 November , 

 December . 



-17 

 + 89 

 - 8 

 -41 

 +65 

 + 3 

 + 23 

 + 68 

 + 18 

 -18 

 + 64 

 -33 



+ 53 

 + 189 

 + 86 

 + 72 

 + 269 

 + 142 

 +379 

 + 127 

 + 120 

 + 65 

 + 147 

 + 20 



+ 83 

 +339 

 + 194 

 +244 

 + 504 

 + 429 

 +360 

 + 254 

 +274 

 + 155 

 +270 

 + 129 



+ 112 

 +400 

 +315 

 + 296 

 + 648 

 +662 

 + 662 

 +317 

 +361 

 +203 

 + 381 

 + 216 



+ 116 

 + *44 

 +392 

 + 398 

 +610 

 +560 

 +758 

 +428 

 +380 

 + 213 

 + 325 

 + 162 



+ 104 

 + 422 

 +447 

 +421 

 +515 

 + 518 

 + 613 

 + 520 

 +418 

 + 188 

 + 266 

 + 156 



+ 127 

 +395 

 +404 

 +369 

 +398 

 + 411 

 + 509 

 +420 

 + 298 

 + 185 

 +244 

 + 130 



+ 129 

 +247 

 + 289 



+ 256 



| 



I +284 

 + 276 

 + 409 

 + 192 

 + 123 

 + 133 

 + 168 

 + 120 



+ 105 

 + 178 

 + 166 

 + 139 

 + 150 

 + 176 

 + 283 

 +225 

 - 23 

 + 93 

 + 42 

 + 83 



+62 

 + 20 

 + 17 

 + 25 

 -14 

 -52 

 + 47 

 + 28 

 -69 

 + 30 

 +35 

 +81 



+ 44 



- 16 

 -184 



- 23 

 -115 



- 86 



- 78 

 + 68 



- 33 



- 12 



- 54 

 + 65 



- 10 

 -166 

 -206 

 -139 

 -189 

 -207 

 -184 



- 3 

 -186 



- 68 

 -157 



- 4 



235 

 845 

 682 

 620 

 98 

 959 

 1342 

 1097 

 720 

 334 

 629 

 382 



78 

 227 

 192 

 185 

 287 

 265 

 337 

 221 

 166 

 105 

 162 



97 



