484 HENEY A. KOWLAND 



cause be found in the layer of air around the mercury of the bulb 

 which cannot be removed without a reservoir at the top? Or may we 

 not also look for such an effect from the minute size of the bore of the 

 capillary tube which creates a different pressure in the bulb from a 

 rising or falling meniscus ? Possibly the two may be combined. 



