260 Mr KELLAND, ON THE MOTION OF 



and putting - for y, we find the pressure on an unit of surface due 

 to the air in the tube 



4/1 f2ff , 2+ a/2 '« . Ji\/%d' + h- 



-4r < losr ■ ,„ V. + - cot- t, 



rt + \/2«'' + e' * « + \/«" + 1i \/rt^ + A'^ " € 



If we adopt the same process as before, (/. e.) suppose h large 

 compared with u, we have the pressure 



4m |2« 1 2 + -v/2 «" 1 e r • 



= FlT^°SviTr+rA-l°g72TT| 



We see then that the introduction of another term has not, in 

 the slightest degree, helped to extricate us from our difficulty; the 

 result still depends on «; nor can I see any mode of avoiding this, 

 and must therefore content myself with leaving it as a difficulty, or 

 rather come to the conclusion that it does depend on a, and that, 



