132 



Report of Magnetical Observations at 



Table III. — Hourly Means of the Horizontal Force at Falmouth 



, 0/wlrt r, „ . on five selected quiet Days in 



0-18000 + (C.G-.S. units.) ^ J 



Hours 



Mid. 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 





Winter. 





1896. 





























*J an. . . 



535 



537 



537 



53S 



541 



541 



544 



547 



548 



541 



534 



526 





Feb. .. 



536 



534 



534 



533 



536 



539 



541 



54-1 



541 



533 



526 



519 





March . 



550 



551 



551 



551 



551 



553 



553 



552 



546 



535 



526 



528 





Oct. .. 



570 



567 



564 



564 



566 



567 



567 



564 



560 



552 



543 



541 





fNov. .. 



569 



567 



566 



567 



569 



573 



572 



571 



569 



562 



554 



554 





Dec. .. 



561 



562 



562 



561 



562 



565 



567 



567 



567 



565 



560 



559 





Means 



554 



553 



552 



552 



554 



556 



557 



557 



555 



548 



541 



538 





Summer. 





April , . 



515 



545 



545 



547 



547 



547 



550 



546 



541 



530 



520 



516 





May .. 



554 



553 



552 



551 



550 



549 



551 



546 



540 



536 



529 



529 





June . . 



567 



563 



562 



561 



562 



562 



556 



551 



546 



543 



542 



548 





July .. 



566 



564 



563 



563 



563 



56L 



557 



554 



549 



540 



538 



542 





Aug. .. 



564 



562 



561 



559 



557 



556 



554 



550 



541 



531 



527 



530 





Sept. . . 



564 



564 



566 



561 



562 



561 



560 



551 



542 



530 



525 



528 





Means 



560 



559 



558 



558 



557 



556 



555 



550 



543 



535 



530 



532 





* Mean of four days, 1st, 21st, 24th, 29th. f Mean of four days, 3rd, 22nd, 24th, 25th. 



. L x Table IV.— Diurnal Range of the Falmouth 



I. units.) 



Hours 



Mid. 



1 



2 



3 



4 



5 6 



7 



8 9 



10 



11 





Summer mean. 







+ '00004j+ -00003 



+ '00002 



+ -00002 



+ -00001 



1 



•ooooo- -ooooi 



- -00006 



- ■00013j- -00021 



- -0C02G 



- -00024 



Winter mean. 





+ -C0002 + -00001 



•00000 



1 



•00000 + -00002 



+ -00004! + -00005 + -00005' + -C0003 - -00004 - '000 J 1 - "00014 



1 1 1 1 1 t 



Annual mean. 





+ -00003 



1 



+ -00002| 



+ -00001 



+ -00001 



+ -00002 



+ -00002' + -oooo-zj— -ooooi 



I 



- -00005 - -00013 



- -00019 - -00019 



Note. — When the sign is + the 



