METEOROLOGY 



379 



has been accurately described in the Meteorologische Zeitschrift, 

 1908, p. 396. It has the advantage that there are no axles or 

 sockets to be rusted or soiled, or filled with rime or drift-snow. 



Pointer 



The two horsehairs (h, h') that are used, are stretched tight by 

 a torsion clamp (Z, Z', and L), which also carries the pointer; the 

 position of the pointer varies with the length of the hairs, which. 



