. Bulletin of the Department of Agriculture. Agriculture; Agriculture. A METHOD OF FUMIGATING SEED. 3 Wten this apparatus is used lor fumigation, the seeds, contained in either a cloth bag or an open vessel, are placed in the chamber, and the requisite amomit of sodium or potassium cyanid in a small beaker is so arranged that the neck of the dropping funnel extends dowii into the beaker (fig. 1,/). The cover is then clamped on and the chamber exhausted. In extracting the air from the chamber, the suction is continued mitil the gauge registers 30 inches or more— that is, the au' in the cha
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. A METHOD OF FUMIGATING SEED. 3 Wten this apparatus is used lor fumigation, the seeds, contained in either a cloth bag or an open vessel, are placed in the chamber, and the requisite amomit of sodium or potassium cyanid in a small beaker is so arranged that the neck of the dropping funnel extends dowii into the beaker (fig. 1,/). The cover is then clamped on and the chamber exhausted. In extracting the air from the chamber, the suction is continued mitil the gauge registers 30 inches or more— that is, the au' in the chamber is exhausted until the pressure is the equivalent of some fraction of an inch of mercury. The suction is then cut off by means of the gas cock, and the required quantity of diluted acid, which has been previously placed in the bulb of the. Flo. J. -Ail ;.ui;i jii 1 ( chainiicr ih) ased in (he exppiimenls described in this bulletin. <lropping furuiel, is allowed to flow slowly upon the cyanid in the beaker witliin the chamber. Tlic hydrocyanic acid is thus prepared in the chamber and no trace can get out. After the seeds are exposed to the gas for the required time, the stopcock of the dropping fun- nel opened to let the air into the chand)er. As the discluuge pipe of the air puni]) extcuids outside the l)uil(ling, i\w. mixture of hydrocyanic ac^id and air can not into the room. As soon convenient, th(? stopper and funnel ar(^ removed and, by means of the air pump, air is sucked ihrougli llie chamber, thus washing the liydrocyanic acid out of tlic chamber before the cover is taken off and the seeds removed. In Ihc experiments descnbed. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. ,
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