238 STATEMENT BY 
seized on the particles of sugar, and soon discovering 
the only way open to them, viz. up the string, over 
the,transom and down the window-frame, rejoined their 
fellows on the sill, whence they could resume the old 
route down the steep wall into the garden. Before 
long the route over the new track from the sill to the 
sugar, by the window-frame, transom, and string was 
completely established; and so passed a day or two 
without anything new. Then one morning it was 
noticed that the ants were stopping at their old place, 
that is, the window-sill, and getting sugar there. Not 
a single individual any longer traversed the path that 
led thence to the sugar above. This was not because 
the store above had been exhausted ; but because some 
dozen little fellows were working away vigorously and 
incessantly up aloft in the vessel, dragging the sugar 
crumbs to its edge, and throwing them down to 
their comrades below on the sill, a sill which with 
their limited range of vision they could not possibly 
see!’ 
Leuckart also made a similar experiment. Round a 
tree which was frequented by ants, he spread a band 
soaked in tobacco water. The ants above the band 
after awhile let themselves drop to the ground, but 
the ascending ants were long baffled. At length he 
saw them coming back, each with a pellet of earth in 
its mouth, and thus they constructed a road for them- 
selves, over which they streamed up the tree. 
