204 Magnetic Storm of May 14, 1878. 
Greenwich the north end of the needle moved eastward between 
6 and 9 a. M, but at Madison the general motion was westerly ; 
oe the shar p deflection commencing at 5" 40™ Mad. time (11" 
8™ p. M. Gr. time) was to the eastward at Madison, and to the 
westward after 11" 45™ at Greenwich, thus deflecting the mag- 
nets in opposite directions 
The northern component of the horizontal force was bl 
affected at Madison, the force diminishing at 144 0 05™ A. M., 
Madison time, 144 6 03™ a. M., pep are The disturb. 
ance continued, but between 23 an , the trace is too 
indistinct to be read; the small caeiiehns reoihanis to about 
11" 45™, when they “become superseded by a series - larger 
waves culminating in a maximum extreme at 2" 80™ P. M., 
ison _ 8 28™ P. M., ns fone cree and a minimum at 3° 
58" p. M., Madison time, 9 56™ Greenwich time. The 
is disturbances continue till aeoe 10" 20 vp. M., having 
reached a maximum extreme about 4° 50™ P. M. Madison time, 
03" p. M., Madison time; 154 3° 01™ a. M., Greenwich time 
Range between maximum at 2" 30", and minimum at 9" 03", 
137 of the horizontal cette nearly. In the Greenwich account 
it is stated “the first start in the trace of the declination mag- 
net at 18" 05™ (Astr. Ree.) is most distinct.” Now within two 
minutes of this time occurs the first and sharpest deflection in 
our horizontal force trace at Madison, thus soa distinctly 
the commencement and simultaneousness of the 
The pat yin coe in the vertical force Somnnahcen mae May 14, 
1» 10™ a. M. (7" 08™ Gr. time), ae terminated about 3" 80" A.M. 5 
between this time and 5" 45™ , the trace was smooth, but 
amounted to 54, of the vertical force. The vertical force trace 
did not dahibit any of the tremulous motion noticed in the 
other two curves. 
I may state that a description of the onc magnetic 
observatory, together with the discussion of the fi rst year’s 
choeheations and results, is nearly Pt in Saint ig pub- 
Heation Cuas. A. Scuorr 
Assistant O. ee 8. pelea oe 
Coast Survey Office, Washington, D. C., Jan. 6, 1879. 
