18 



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



No. 1 boiled between 247—250°. 

 „ 2 „ 250-255°. 



„ 3 „ 255—300°. 



,, 4 boiled above 300° ; a brown resinons residue was left in the 

 retort. 



The second fraction distilled almost entirely between 250° and 253°. 



DlAG-EAM 17. 

 Oil of cloves. (Dr. Gladstone's specimen.) 

 The absorption band is evidently due to eugenol, C 6 H 3 (OH) -| ^ 



OCH 3 

 3H5 



Absorption still seen at 1 in 50,000. 



Oil of cloves contains a small portion of a hydrocarbon, C 15 H 24 , 

 together with eugenol (Ettling, " Ann. Pharm.," 9, 68, also Gmelin, 

 English edition, vol. xiv, p. 202). The boiling-points of the hydro- 

 carbons with the formula C 15 H 24 lie between 249° and 260°. It is 

 therefore extremely improbable that the hydrocarbon could be sepa- 



