168 



REPORT — 1897. 



Earth Movements recorded by a Bifilar rendulum at the Royal Observatory^ 



Edinburgh. 



Date 



Aug. 25 



26 



Nov. 



Dec. 

 Feb. 



Sept. 20 



''1 



23 

 Oct. 6 



2 



4 



5 



26 



4 

 6 



7 

 16 

 19 



Mar. 18 



Time, 

 G.M.T. 



H. 

 4 

 5 



M. 

 45 



40 



21 10' 



2 10 



11 15 



11 50 



18 



22 



23 



1 



3 



5 



6 



17 



35 



50"! 

 20 J 

 50 i 

 35 I 



20 J 



11 57 \ 



12 17/ 

 20 10 

 20 30 

 22 46 



6 48 

 22 35"! 

 10 15 f 



12 32" 

 12 47 



12 I; 



13 17 

 2 54 



Eem.irks. 



Slight tilt to North. 

 „ ,, South. 



Four slight bends in curve, North and South 

 alternately. 



Gap in curve. No photogi-aphic effect pro 

 duced from llh. 15m. to llh. 30m. ; broadened 

 and badly defined line llh. 30m. to llh. 50m. 



Tilt, to North. 



Gap very similar to the one at llh. 15m. 



Four bends in curve, South and North alter- 

 nately. 



Trace of diffusion in the curve line. Line 

 slightly bent at several points during the 

 day. 



Line distinctly diffused for 20 minutes. 



Bend to North. 

 Normal direction resumed. 

 Bend to South. 

 Tilt to North. 



Line very irregular, sinuous. 



Several very slight irregularities during the 



day. None well marked. 

 Small tilt to South. 

 Large tilt to North, about 2"-5. 

 Line diffused, with well-marked widening to^ 



South. 

 Large tilt to North. 



•» >» »» 



Strong „ „ 



Gap in photographic trace. (At 9h. 30m gap 

 begins abruptly. At 9h. 48m. line is nearly 

 normal for a few minutes Slight diffusion 

 and widening lasts up to lOh. 2m.) 



Gap in photographic line. (Atl2h.32m.lineshows- 

 slight trace of diffusion and widening. 12h. 

 47m. to 12h. 52m. line is nearly normal, when 

 thegap begins, and ends sharply at 13h. 17m.) 



Small tilt to North. 



