Spieazines 27 



It appears that a triple junction between three 

 adjacent spirals is the arrangement which occurs 

 most frequently in nature, because a large num- 

 ber of spirals connected in this manner will col- 

 lectively form a cluster of hexagonal compart- 

 ments as shown in Fig. 3, and a hexagon is one 



Fig. 3. Hexagonal 



compartments. 



of the few figures which when duplicated will 

 completely cover a certain area, like the cross- 

 sectional area of a bacillus or a connective tissue 

 fiber. The only other possibilities are quadrilat- 

 eral or triangular compartments, but the exis- 

 tence of these, except at the free surfaces, 

 appears very improbable because they would re- 

 quire the connection of four and six adjacent 

 spirals respectively. It does not appear that 



