560 



Report of Magnetical Observations at 



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



Table III. Hourly Means of the Horizontal Force at Falmouth 



(corrected for Temperature), on five 



(C.GKS. units.) 



Table IV. Diurnal Range of the Falmout' 



NOTB. When the sign is + th 



