H. HAGA and F. M. JAEGER. Röntgen-Patterns of Boracite below and 

 above its inversion-temperature. 



Fig 2. - 

 Boracite 18° C. Distance: 42.5 mM. 



Fig. 3. 

 Boracite 300° C. Distance: 61 mM. 



Fig. 4. 

 Boracite 18° C. Distance: 61 inM. 



Proceedings Royal Acad. Amsterdam. Vol. XVI. 



