FEEDERS AND FEEDING. 133 



The central circle represents the feed-hole of the 

 crown-board, which should be situated exactly between 



A and B ; the latter, a locksmith's screw or drawing pin, 

 is placed so that its head laps over the edge of the plate 

 and holds it in position, while it permits its rotation as 

 far as the stops e and/". The plate is pierced, as per 

 pattern in figure, by a heated knitting-needle, the burrs 

 removed by scraping, and the under side roughened by 

 a sharp knife, so that the Bees may have foothold. If 

 the whole has been arranged as described, and the feed- 

 ing stage turned until the stop f touches the screw B, 

 the circle on the right will be over the aperture in the 

 crown-board, and as this circle contains no holes, the 

 Bees, although the bottle may be on, will get no food ; 

 but if the stage be now slowly turned back again, the 

 hole c will pass over the feed-hole, allowing only one 

 Bee to regale herself at a time ; a further movement, 

 and d is reachable from beneath, next the hole near the 



