( 777 ) 

 Hence the followini^ moveineiils appear pretty constant: 



So it seems that the constancy in the appearance of a defiiiile 

 sense of movement decreases with tlie geographical latitude and that 

 it is furthermore for H the greatest and for D the smallest, more- 

 over for H always with a poslt'we sense of movement. 



Extension of the movement about the earth. 



The nature of the initial movements, which took place simultane- 

 ously on different points of the surface of the earth could he studied 

 by means of the above mentioned summary diagrams. 



It was quite evident that for H and D but not for if places lying 

 close to each other show about the same image, but that for places 

 in other parts of the world this is often quite ditferent. 



The small number of stations only allowed a closer investigation 

 of that difference for North-America aiid Europe. I therefore give 

 below a survey of the movement for H and /) in Europe and North- 

 America, where however the latter for the years 1892 — 94 is repre- 

 sented only l)y two stations (Toronto in Canada and San Antonio 

 in Texas). 



