10 BULLETIN 282, U. S. DEPARTMENT OF AGRICULTURE. 
Taste VII.—Soft resins in the original samples of sulphured and unsulphured hops 
and in samples kept in cold and in open storage, calculated with reference to the total 
resins. 


Cold storage. Open storage. 
Original 2 P 8 
Treatment at the kiln. sample, 
Tea 1912 1913 1914 1912 1913 1914 
Per cent. | Per cent. | Per cent. | Per cent. | Per cent. | Per cent. | Per cent. 
Sulphured eee seers rere ele 70. 13 64, 59 56. 08 33. 47 57. 63 49. 83 24. 06 
Wnsulphunedie ea. Sen ceeey 63. 46 53. 79 46. 21 27. 49 47. 80 41.55 18.15 



The data in Table VII show that the sulphured cold-storage hops 
retained a greater percentage of soft resins each year than did any of 
the other samples. The unsulphured hops in cold storage and the 
sulphured hops in open storage contained year by year practically the 
same percentage of soft resins, as calculated with reference to the 
total resins. The greatest decrease is noted in the soft resins from 
the unsulphured hops in open storage. 
CHANGES IN THE COMPOSITION OF THE SOFT RESINS. 
That chemical changes take place in the soft resins of hops is a 
foregone conclusion. In order to study these changes, methods in 
general use in chemistry, with some modifications, were applied to 
the soft resins with satisfactory results. The physical properties of 
color and odor presented in Table VIII were observed from year to 
year. 
TasiEe VIII.—Physical properties of the soft resins in the original samples of sulphured 
and unsulphured hops and in samples kept in cold and in open storage. 








Cold storage. 
Treatment at the kiln. Re: 
1912 1913 1914 
Color: 
Dulphunedemeas aes Greenish brown.| Dark brown.....|'Greenish brown.| Greenish black. 
Umsulphureds semasskacee Dark brown...--| Very dark }..-.. dosseaite Do. 
brown. x 
Odor: 
Sul phune den ses ese scm ues Aromatic, pleas- | Aromatic, pleas- | Aromatic, pleas- | Aromatic, un- 
H ant. ant. | ant. pleasant. 
WUmsulphunedss ese oe eceteci | Stoeee do...........| Aromatic, pun- | Agreeable, hop- Do. 
% gent. like. 
Open storage. 
Treatment at the kiln. Original sample, 
1912 1913 1914 
Color: 
Up Mredte es emetic ce ee Greenish brown.| Dark brown ....| Greenish brown.| Greenish black. 
Unsulphured ye Dark-browmleeeelase = CON eae a Goperieres Do. 
Odor: J 
Pulp Une seee epee Aromatic, pleas- | Aromatic, pleas- | Aromatic, pleas- | Disagreeable, 
ant. ant. ant. somewhat aro- 
R , matic. 
asi phiredais ce nciecesecall ccc rokoyMau sd drape ee | Aromatic, pun- | Aromatic, pun- Do. 
gent. gent. 




