8 MISC. PUBLICATION 318, U. 8S. DEPT. OF AGRICULTURE 
MAKE KILLING JARS 
[Fourth meeting—May] 
Equipment : 
1. A 1-pint fruit jar (tight lid). 
2. Piece of cardboard (double-faced, corrugated preferred). 
3. Small bottle of gasoline or calcium cyanide. 
4, POISON label for calcium cyanide. 
Procedure: 
Cut cardboard to fit tightly inside jar. 
For gasoline killing jar— 
1. Place several small scraps of cardboard in bottom of jar. 
2. Saturate scraps with gasoline. 
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FIGURE 14.— FIGurE 15.— FIGURE 16.— 
Glass jar. Gasoline Cyanide 
killing jar. killing jar. 
3. Cover with cardboard disk. 
4. Place lid on tight. ; 
For calcium cyanide killing jar (dangerous! handle with caution )— 
1. Place calcium cyanide (G grade) about half an inch deep in 
bottom of jar. 
2. Cover with cardboard. 
3. Place lid on tight. 
4. Place POISON label on jar. 
5. Plaster of paris may be poured in jar on cardboard to make a 
better seal. 
PIN INSECTS 
Equipment : 
1. Pins (No. 3 insect pins preferred; common pins may be used). 
2. A few freshly killed insects representing each of the five major groups; 
namely, stinkbug, beetle, bee or fly, grasshopper, butterfly. 
3. Spreading board. 
4. uabels to be placed on pin with insect. 
Beetle Bee Grasshopper 
FIGURE 17.—Insects, properly pinned. 
Procedure : 
1. Pin insects according to figures 5, 6, 7, and 8 of Farmers’ Bulletin 1601 
(pp. 8-10). 
2. Place on pin, label giving name of insect, name of collector, date when 
collected, and place. 
a. Instructions; See sixth meeting, calendar of activities, first year. 
