Vlll 



AHT. PAOE 



7^S. Metlxjds of renfiriterint: tlie inoveiiipiits of tlie gioiiml lelative to the 



Steady Point 77 



7it. Ol )j cot ions to Static Ilecoids 77 



fSO. Records of displacement in eonjunction witli time 78 



81. Constructive details 79 



82. Kequirements of a Seismological Observatory 81 



x:}. Determination of the Direction and Velocity of Transit 83 



84. Velocity of Transit of Artificial Earthquakes 8(i 



«."). Experiinen till Tests of Seismographs 86 



APPENDIX (TO CnAPTF.n III ) : — 



Astatic Suspension by I.inkwurk 89 



