1370 
certainty of some intensity factors, e.g. those referring to the thermal 
movement of the valency electrons. 
For the value of the diameter of BraGe’s atomic domain ') follows 
from the given structure 3.04.10-® which is in very good agreement 
with the value given by Brace (3.00.10 ®). 
5. Summary. Lithium erystallizes in centered cubes, lattice-para- 
meter a= 3,50.10-8 em.; no lattice of stationary valency electrons. 
Possibly binding circles normal to the trigonal axes. 
In conclusion we express our great indebtedness to Prof. Smits 
for his assistance and the great interest he has taken in this work. 
Laboratory of Physical and Inorganic 
Chemistry of the University. 
Amsterdam, March 14% 1921. 
Whilst this paper was being printed our attention was directed 
by a paper of Trirrine (Z. f. Phys. 4, 1, 1921), to the appendix 
of a paper by Hager (Sitz. Ber. der Preuss. Ak. d. Wiss. 51, 990, 
1919), from which appears that at a meeting of the d. Chem. Ges. 
Drayer already communicated the result of still unpublished in- 
vestigation of Li, which agrees with our conclusion as to the 
arrangement of the Li-particles, and the rejection of the lattice of 
stationary electrons. 
') Phil. Mag. August. (1920), p. 169. 
