12 



Results of Makerstoun Observations, 1845. 



TABLE XX. — Diurnal Range of the Horizontal Component of Magnetic Force for each Civil Day, as 

 deduced from the Hourly Observations, with the Mean for each Week in 1845. 



Civil 

 Day. 



Jan. 



Feb. 



March. 



April. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 





0-0 



0-0 



0-0 



0-0 



0-0 



0-0 



0-0 



0-0 



O'a 



o-o 



0-0 



0-0 



1 



0157 



0203 



0174 



0336 



0602 



[0377] 



0435 



0420 



0476 



0281 



0533 



0148 



2 



0151 



[0218] 



[0222] 



0290 



0252 



0242 



0472 



0386 



0588 



0328 



[0299] 



0249 



3 



0081 



0183 



0220 



0426 



0358 



0351 



0354 



[0477] 



0487 



0309 



0260 



3538 



4 



0073 



0164 



0136 



0417 



[0411] 



0346 



0368 



0745 



0889 



0336 



0221 



1193 



5 



[0119] 



0252 



0172 



0431 



0409 



0438 



0323 



0448 



0407 



[0341] 



0343 



0262 



6 



0095 



0370 



0193 



[0434] 



0400 



0384 



[0377] 



0445 



0416 



0445 



0200 



0221 



7 



0225 



0182 



0227 



0473 



0448 



0427 



0269 



0340 



[0506] 



0312 



0358 



[0349] 



8 



0088 



0134 



0269 



0386 



0412 



[0446] 



0582 



0508 



0540 



0316 



0150 



0146 



9 



1687 



[0215] 



[0232] 



0472 



0447 



0526 



0368 



0427 



0468 



0727 



[0203] 



0123 



10 



1375 



0221 



0315 



0307 



0405 



0514 



0421 



[0395] 



0316 



0693 



0127 



0150 



11 



0169 



0143 



0214 



0344 



[0416] 



0385 



0451 



0370 



0347 



0308 



0210 



0130 



12 



[0661] 



0241 



0172 



0347 



0339 



0454 



0398 



0353 



0399 



[0401] 



0171 



0231 



13 



0230 



0325 



0244 



[0872] 



0427 



0340 



[0403] 



0374 



0423 



0265 



0153 



0336 



14 



0249 



0127 



0346 



3542 



0469 



0367 



0477 



0392 



[0375] 



0207 



0154 



[0245] 



15 



0259 



0105 



0351 



0398 



0543 



[0377] 



0361 



0699 



0319 



0209 



0161 



0392 



16 



0126 



[0176] 



[0340] 



0297 



0799 



0316 



0311 



0521 



0319 



0311 



[0260] 



0150 



17 



0203 



0214 



0323 



0351 



0609 



0374 



0377 



[0513] 



0445 



0378 



0654 



0230 



18 



0218 



0118 



0447 



0413 



[0578] 



0414 



0364 



0445 



0545 



0328 



0245 



0300 



19 



[0479] 



0167 



0332 



0683 



0599 



0356 



0377 



0503 



0326 



[0359] 



0196 



0101 



20 



1715 



0375 



0668 



[0469] 



0475 



0473 



[0418] 



0519 



0336 



0276 



0141 



0115 



21 



0106 



0360 



0389 



0540 



0441 



0444 



0493 



0475 



[0396] 



0405 



0188 



[0157] 



22 



0504 



0378 



0307 



0416 



0493 



[0401] 



0434 



0402 



0308 



0455 



0302 



0143 



23 



0335 



[0439] 



[0488] 



0409 



0386 



0438 



0462 



0337 



0364 



0213 



[0182] 



0153 



24 



0452 



0627 



0559 



0599 



0573 



0431 



0479 



[0388] 



0496 



0232 



0153 



0132 



25 



0378 



0406 



0528 



0619 



[0404] 



0266 



0813 



0360 



0872 



0335 



0210 



0143 



26 



[0473] 



0490 



0475 



0571 



0312 



0428 



0344 



0444 



0368 



[0203] 



0099 



0119 



27 



0479 



0360 



0487 



[0588] 



0337 



0349 



[0448] 



0308 



0571 



0158 



0139 



0230 



28 



0361 



0269 



0274 



0875 



0321 



'0473 



0389 



0374 



[0436] 



0133 



0508 



[0197] 



29 



0833 





0384 



0384 



0314 



[0441] 



0337 



0770 



0266 



0146 



0323 



0172 



30 



0277 





[0347] 



0480 



0585 



0490 



0329 



0588 



0256 



0182 



[0817] 



0370 



31 



0231 





0311 





0427 





0419 



[0547] 





0256 





0148 



TABLE XXI. — Means of the Diurnal Ranges of the Horizontal Component of Magnetic Force, 

 with reference to the Moon's Age and Declination, for 1845. 











After 





After 





Moon's 



Mean 



Moon's 



Mean 



Moon 



Mean 



Moon 



Mean 



Age. 



Range. 



Age. 



Range. 



farthest 

 North. 



Range. 



farthest 

 North. 



Range. 



Day. 



0-00 



Day. 



0-00 



Day. 



0-00 



Day. 



0-00 



15 



3538 







3310 







3481 



14 



3731 



16 



3976 



1 



5104 



1 



4383 



15 



3281 



17 



3895 



2 



4401 



2 



3637 



16 



3216 



18 



4513 



3 



3537 



3 



6304 



17 



7364 



19 



3945 



4 



6065 



4 



3565 



18 



4982 



20 



3485 



5 



3967 



5 



4209 



19 



3286 



21 



4553 



6 



3315 



6 



3890 



20 



3433 



22 



3444 



7 



3822 



7 



4159 



21 



3301 



23 



3161 



8 



5964 



8 



40C8 



22 



3135 



24 



3582 



9 



3205 



9 



3937 



23 



3422 



25 



2996 



10 



3396 



10 



3911 



24 



2731 



26 



3125 



11 



3394 



11 



3126 



25 



3276 



27 



2875 



12 



4643 



12 



3486 



26 



3119 



28 



2950 



13 



3393 



13 



3461 



27 



3194 



29 



3346 



14 



3536 











