18. [Fig. 6] shows the three Davis rollers made of rubber. One is used in the wiping out of heart growths; another for the wiping out of champs in quartered oak and other woods, which when quartered present the same peculiarities. The last has three graded sets of indentations and are used as combs for any kind of combing where rubber combs are used.

In this lesson it is not the purpose to explain the use of the tools enumerated; this will come under its proper heading when the modus operandi of graining, both by hand and by the use of other helping tools will be fully detailed.

19. [Fig. 7] shows another rubber device, patented by the Ridgely Trimmer Co. The corrugations, as will be seen, are in halves and are made so that by proper pressure upon the handles curves them, enabling the operator to follow indentations, and which also produces many variations upon plain surfaces.