Scientific Intelligent 



eful stud 



that the phenomena observed were due 



mi thf mercury, produced by sudden rise 



due to chemical change at the surfac 



i of Heli 



holtz upon the electrical work done at the surface of separate 

 between lii|uids, which results in diminishing the surface tensio 

 —Annalen der Phgsik u„d Vhtmie, No. 5, 1 882, pp. 1-38. 



9. The change of color tones of spectrum colors and pigmei 

 with decreasing light. — Certain observers, among whom is Dr. 

 Chodin, have maintained that there i- a close "analogy betwe 

 the colors of pigments and tin color- ,.| the spectrum. T 

 latter maintained that with diminution of light yellow, oran 

 and green impress the eye more than blue and violet. On t 

 other hand Purkinje states that pigments with diminishing lig 



iiuvrning the change of the correspond- 

 ige of the latter is the result of the 

 homogeneous colors. The behavior ot 

 diminution of light is explained by the 

 ory, with the following addition: a re- 

 f different colored lights betokens a 

 sensitiveness in this wise, that for rays. 



bed made b\ I..„-d Wayh-iJh and ' Mi J.' I i'" ShhJwick. 



mercury unit = 0-1)536 B. A. units; and according to Mat- 

 tel, and llockin, 

 mercury unit = 09619 B. A. units. Lord Rayleigh finds. 



[ mercury unit = 09541 8 B. A. units. 



