370 COMB FOUNDATION. 
a number of Apiarists. As it is the easiest working of all 
foundation-machines, a great many, who could not suc- 
ceed in making foundation on the mills, succeeded on this 
press. Another advantage claimed for it, is that it can 
make foundation in wired-frames by pressing it right over 
the wires. But a press has the disadvantage of leaving in 
the sheets all the irregularities, which they may have, when 
dipped; while in the roller-mills, these irregularities are 
‘‘laminated out.’? Hence, pressed-foundation can never be 
as regular as rolled-foundation. 
6883. Plaster moulds and other utensils have been tried 
for foundation-making, but these cheap implements are 
almost entirely discarded. 
Fig. 116. 
THE DUNHAM MILL. 
684. The Root-mills,—the most practical—have been 
improved upon in different ways, by C. Olm, by Mrs. Dun- 
ham of Wisconsin, and by J. Vandervort of Pennsylvania. 
The latter gentleman, one of America’s eminent machinists, 
makes most superior mills for any grade of foundation. 
