10 Prof. W. N. Hartley and A. K. Huntington. 



3 0*0 , go^q , and 2 * 00 of this oil were taken. It is remarkable for its 

 strong absorption, though it shows no band. (Diagram 8.) 



Diagram 8. 



Diagram 9. 



Oil of Gitronella. (From Penang. Dr. Gladstone.) — Two fractions 

 were distilled off: at the following temperatures : — 



1st. 230—260°. 

 2nd. 260—300°. 



The first portion was photographed undiluted, diluted 2,000 and 

 5,000 times. (Diagram 8.) 



Oil of Elder (Dr. Gladstone). — This oil boiled between 168° and 

 175°. The oil itself and solutions containing 5-^0, 1 q^q , and t^q-q, 

 were examined. (Diagram 8.) 



Oil of Melaleuca Ericifolia (Dr. Gladstone). Boiling-point 170 — 

 180°. — Faintly yellow. Photographs were taken after diluting to 500, 

 1,000, 2,000, and 5,000 volumes. (Diagram 5.) 



