THE PRESENCE OF ARSENIC IN HOPS. 



Table II. — Arsenic in kiln-dried hops and in sulphur used in curing certain lots of hops 



grown in Oregon in 1915. 



No. 



Source of sample. 



Arsenic as 



As 2 03 (parts 



per 



million) . 



No. 



Source of sample. 



Arsenic as 



As 2 3 (parts 



per 



million). 



Place. 



Yard, etc. 



In 



the 

 hops. 



In 



the 

 sul- 

 phur. 



Place. 



Yard, etc. 



In 

 the 



hops. 



In 



the 

 sul- 

 phur. 



195 



Independence. 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do-. 



Brooks 



Yard G 



0.4 



f 6.6 



I 7.1 



5.2 



3.8 



1.0 



6.1 



f 1.3 



hi 



:? 



1.9 



20 

 20 



116 



3.56 



35 

 20 



208 

 205 

 210 

 206 

 209 

 211 

 212 

 214 

 216 

 218 

 223 

 225 



Brooks 



Springfield 



do 



Harrisburg 



do 



do 



YardB 



0.5 



4.2 

 4.1 

 2.6 

 4.5 

 26.0 

 3. 4 



4.4 



2°9 



Yard GUlupli- . 

 Yard G/cates... 



YardH 



YardK 



Yard L 



Yard A 





233 



YardB 





198 



Yard A 





180 



YardB 





207 



YardC 





224 



YardM 



Yard N\ dupli- 

 Yard NJ cates . . 

 Yard Ol dupli- 

 Yard Of cates. . 

 Yard P\ dupli- 

 Yard P/ cates . . 

 Yard A 





115 



22S 



Donald 



do 



St. Paul 



Yard A... 



2.7 

 3.4 

 3.8 

 3.9 

 4.2 



90 



232 



YardB 



123 



230 





116 



234 







76 



231 







188 



235 

 204 









3.93 















Analyses of all the samples of sulphur collected are given in Table 

 III. With a few exceptions these samples were taken from the hop 

 yards and are representative of the sulphur used in curing the crop 

 of 1915. Three samples of sulphur used in curing the crop of 1914 and 

 two commercial samples also are included. 



The quantity of sulphur on hand at the hop kilns varied from a 

 few hundred pounds to several tons. As a rule, the individual lots 

 were far from uniform in appearance, and in many cases several 

 different kinds of sulphur seemed to be present. Some pieces were of a 

 bright lemon-yellow color and others of various shades of orange. Some 

 pieces were hard and glasslike; others appeared more crystalline and 

 crumbled readily, while some pieces were porous, resembling pumice 

 in appearance. In most of the lots the sulphur consisted of pieces 

 of different sizes, from lumps 6 or 8 inches across down to a fine 

 powder. This made sampling difficult, but the agreement between 

 the values obtained for samples 181 and 200, which were taken to 

 represent the sulphur in one lot, indicates that the samples were rep- 

 resentative of the various lots at the time of sampling. 



Table III. — Arsenic in sulphur used for curing hops grown in Oregon in 1915. 



No. 



Source of sample. 



Arsenic 

 as AS2O3 

 (parts per 

 million). 



No. 



Source of sample. 



Arsenic 

 as As 2 Os 



Place. 



Yard, etc. 



Place. 



Yard, etc. 



(parts per 

 million). 



IS? 



Independence. . . 



YardB 



64 

 197 

 170 

 116 



66 

 f 356 



j 329 



35 

 20 

 141 



213 

 215 

 217 

 219 

 220 

 222 

 226 

 190 



227 







115 



IP! 



Yard F (1915)... 

 Yard F (1914)... 

 Yard H 





Yard A 



90 



192 



do 



do 



Yard B 



123 



197 



do 



St. Paul 





116 



1'9 



do 



YardK (1915)... 

 Yard K) 



(1914)ldupli- 

 Yard Kf cates. 



(1914)1 

 Yard M 





Yard B . . . 



4.4 



181 



do 







76 





do 







188 



WO 



Independence. . . 

 Portland 



Commercial 



sample 



Dealer's sample. 





Wl 



do 



3.6 

 7.1 



193 



.. do 



Yard 





189 



do 



Yard R 



116.7 















