. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE ARGENTINE ANT : DISTEIBUTION AND CONTROL. 19 The Xickels siriip^ was then drained from- its jar and was found to weigh 160 grams. The jar and crystals were then weighed, the crystals dissolved out of the jar, and the weight of the jar subtracted from the total weight of the jar and crystals. It was found that 333 grams of sugar crystals were present. Grams. Weight of sirup when first made .- 660. 23 Weiglit of sirup remaining + sugar crystals 493. 00 Water p'assed off by evaporation 167. 23 The grams of siru
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE ARGENTINE ANT : DISTEIBUTION AND CONTROL. 19 The Xickels siriip^ was then drained from- its jar and was found to weigh 160 grams. The jar and crystals were then weighed, the crystals dissolved out of the jar, and the weight of the jar subtracted from the total weight of the jar and crystals. It was found that 333 grams of sugar crystals were present. Grams. Weight of sirup when first made .- 660. 23 Weiglit of sirup remaining + sugar crystals 493. 00 Water p'assed off by evaporation 167. 23 The grams of sirup contained grams of sodium arsenite with a poison content of per cent. The 160 grams of sirup remaining contained grams of sodium arsenite. The poison content was now per cent. The sirup with tartaric acid had a small precipitation. As the Brix had been raised per cent through evaporation, the poison content was very slightly raised. This sirup now weighed grams, the color and sweetness being still quite stable. Immediately after prepar- ing these two sirups, April 23, 1914, 2 fruit jars of each, containing 1^ gills of sirup apiece (without honey), were set out along heavy ant trails in the Horticultural Hall. Absolutely clean and odorless sponges were used. For the first 4 days the ants showed a preference for the old type of sirup (without the tartaric acid) but for the next 21 days they showed no preference. Then one jar of the old sirup was abandoned. This proved to be partially decomposed. On moving to another spot it was attended for 10 days more, then abandoned completely. Thus for a total of 35 days this jar attracted the ants. Seven days later the other jar of this sirup was abandoned and no matter where placed neither jar had any attraction for the ants. 1 Figure 3 shows the small quantity of sirup that still remained, as well as the large bulk of sugar crystals which had formed in the jar. The jar containing the acidified sirup is
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