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of a narrow strip of tracing linen, coated with a com- 
position of white wax and starch, and upon which the 
comb-foundation or base of the cells were impressed, by 
passing it through a pair of engraved rollers. This strip 
he fastened in the middle of the moveable-comb bars 
of the Dzierzon hive, and on which the combs were 
built by the bees. This device, however, was super- 
seded, about the year 1849, by the more simple and 
cheaper triangular strip of wood attached in its stead. 
Upon the first introduction of movable-comb frames 
into this country, many bee-keepers failed to obtain the 
comb within the frames, and many do fail yet, in 
defiance of some contrivances used to effect the desired 
result. Attaching strips of comb to the under side of 
the top bar of such frames as have no effectual comb- 
guide, is a very good practice, when the comb can be 
obtained without cutting it from other hives. If such 
pieces of comb are pieces of worker-comb, it secures the 
object of obtaining worker-comb instead of drone-comb, 
as the bees generally continue the building of that comb 
with which it is started. The triangular comb-guide, 
above-named, has since been adopted in this country, 
but instead of using it on a movable-comb bar, it is at- 
tached to the under side of the frame top, so as to have 
a sharp corner projecting downward. This is the most 
valuable device yet known, and is universally adopted. 
Another method, is the variable cross-bars which con- 
sists in having every alternate cross-bar two inches 
