H = 



r . dl . sin 6 



+ 



422 



r . dl 



js8{\ - cos e f 3 sin 6 



cos 6 



' 1 —.cosé^J' 



2x ^^ . 



b3' i)iitting: ^ == and p = , where r is the radius ot the 



?■■- . df r . dt 



capillary tube, and / ^nd H are the known symbols. 



The mentioned formulae can by this substitution be changed into : 



1 



4 cos 6 sin' (7J 



1 j 1 , 



en r> :=: sin 6 A { cot ^ A 



^ ^ 3 I ^ sinOsin'i^l^y 



Now it is possible to ealcuhile for a complete series of values of 

 6. the numbers p and q, and to pk^t them against each olher with 

 respect to rectanguhxr coordinate-axes. If H is measured, and r and 

 di are known, p can be calcidated for every experiment, and from 

 the diagram the cori'esponding value of g (and therefore also of x) ('an 

 be immediately found. The following tal)l<^ gives a survey of the 

 corresponding values of [> and 7, for a series of angles 8 between 

 0" and 90° C. 



From this lai)le it is seen, that p and ([ reacii simultaneous]}' a 

 ininiiiiKin loi- ^ = 70° 31' 43", and that Cantor's formula is properly 

 only \ali(l wiihout npp:c(.i:;l)'e error for \alues of e between 0° and 



