492 
PROFESSOR A. SCHUSTER ON THE DIURNAL 
Fig. 8. 
Lisbox. 
Comparison between calculated and observed curve of vertical force. The absciss® denote astronomical 
time, tbe ordinates vertical force, tbe unit of force being C.G.S. 10"®. 
Observed curve, white line. Curve calculated on bypotbesis of outside force, dotted line. Curve 
calculated on bypotbesis of inside force, white and black line. 
