THE ENTWINED COMB MARBLE.
(SEE [SPECIMEN PLATES].)
This comb-marble, produced by drawing the comb back, is a great favorite on account of its beautiful designs, but is more adapted for thicker books as on those only can the pattern be seen to full advantage.
The production is entirely the same as that of comb marbles, but the teeth of the comb must be about 1/2 inch distant from each other and the comb must be 1/2 inch less in width than the trough so that it can be moved right and left at will, when the marble is drawn by this comb the latter is drawn back in such a way that the teeth cross the centre of the scales.