1886.] on Capillary Attraction. 507 



and the same inadvertence renders the small print paragraph on p. 60 

 very obscure. The curious and interest 'ng statement at the top of 

 the second column of p. 63, regarding a drop of carbon disulphide in 

 contact with a drop of water in a capillary tube would constitute a 

 perpetual motion if it were true for a tuba not first wetted with water 

 through part of its bore — " ... if a drop of water and a drop of 

 bisulphide of carbon be placed in contact in a horizontal capillary 

 tube, the bisulphide of carbon will chase the water along the tube." 



Additional Note of June 5, 1886. — I have carefully tried the 

 experiment referred to in the preceding sentence, and have not found 

 the alleged motion. 



[W. T.] 



