88 P. E. Chase on influence of Gravity on Magnetic Declination. 
those critical hours which are nearest to the hours of maximum 
sun-ward gravitation (V1). @ precise coincidence both in 
time and direction of the lunar-diurnal declination and tidal 
curves (VII), the unavoidable inference that the moon has no 
constant or specific magnetic action (VIII), the “ establishment” 
of ten minutes at the Philadelphia station (IX), the correspond- 
ence of the lunar and solar curves in the diminished winter am- 
ducing internal tides, which may contribute 
amorphism of stratified rocks which has been referred b geolo- 
ong! to the Rig of heated fluids and vapors. (See Rogers, 
a. Report, ii, 700; Lyell, this Journal, [2], XXxix, 22. 
‘The inclination presents some anomalies that are difficult to 
explain, and whether we compare the solar-diurnal or the annual 
curves at the principal northern and southern Stations, the “in- 
dications of a difference in the mode of operation of the solar in- 
fluence in the two cases” seem as striking and perplexing as 
LLL LE LN OO I OIIEY 
