212 EXPERIMENTS WITH 
under the violet glass and 
bisulphide. 
9.45 is »» half under each. 
10 29 ” 29 29 
In this case, therefore, though without the layer of 
bisulphide the violet glass would always have been 
avoided, the result of placing the bisulphide over the 
violet glass was that the ants did not care much 
whether they were under the violet glass or under the 
bichromate of potash. 
I then took the same solution of carmine which T 
had already used. 
10. The ants were under the carmine. 
10.15 ” ” rr] 
10.30 35 most under the carmine, but 
some under the violet. 
10.45 $5 under the carmine. 
11. 5 most under the carmine, but 
some under the violet. 
Here, then, again the bisulphide made a distinct 
difference, though not so much so as with the bichro- 
mate of potash. 
I then took the solution of chlorate of copper 
ulready used. 
1 About half the ants were under each. 
1.30. The greater number were under the violet 
glass and bisulphide. 
