1904 - 5 .] Magnetic Quality in Molecular Assemblages. 1041 
transverse to the direction of magnetisation, which component, in 
the neighbourhood of a quaternary axis, is directed from that 
axis. Similarly, on either view, the induction in the neighbour- 
hood of a ternary axis makes with that axis a smaller angle than 
the external force makes. The direction of the induction always 
lies within, or on the boundary of, the trihedral angle formed by 
the three planes which pass through pairs of co-initial lines drawn 
in the directions of the external force and the two nearest ternary 
axes. These results are in entire accordance with Weiss’s state- 
ment, already quoted (§ 3), that the magnetisation turns more 
quickly than the field when it separates from an axis of maximum 
magnetisation. 
But, when the curves in figs. 5 and 6 are compared with the 
corresponding curves in figs. 2 and 3, with which they should 
agree if Wallerant’s formulae were correct, it at once becomes 
evident that the characteristic flatness of the loops on the sides 
next the axes is absent. The curve of fig. 5 is quite symmetrical ; 
and the curve of fig. 6 is actually very slightly flatter on the 
inner side of its smaller loop than it is on the outer side, though 
the opposite is true of the larger loop. 
PROC. ROY. SOC. EDIN. — YOL. XX Y. 
66 
