ARTIFICIAL AIDS TO COMB-BUILDING. 
199 
that this is a valueless addition when the frame 
ends themselves keep the lateral spacing. They are 
struck up from ordinary tin plate, and grasp the lug 
by their own elasticity. When it is desired to re- 
duce the interspace, it is only necessary to draw 
back every alternate one, as at A ; and this can be 
accomplished without removing the frame from the 
hive. The retention of the Standard top bar ne- 
cessitates the prolongation of the metal to where 
it is doubled round, so as to meet the face of the 
Fig. 56.— Adjustable Metal Ends (Scale, i). 
A, Cart’s, Set for Narrow Spacing. B, Ditto for Wide Spacing— Metal Ends. 
C and D, Another Form suggested by Author. 
next “end,” and preserve the exact distance of 
from centre to centre. I have often thought that the 
form suggested by C and D, made in type-metal, 
would answer the purpose of many. The wide sides 
of the “ends” being made i-^^^n., will make this the 
distance of frames from centre to centre. Under the 
arrangement D, the opposite side being i^V^n., the 
turning of every alternate “end” makes the spacing 
the mean between the two — i.e.^ Iw'b., as at C. This 
form has inconveniently narrow, abutting faces, and 
the disadvantage of requiring to be pulled off and 
