091v - - - - - [continued]
since the two bones are joined, co cut them evenly all around, & make notches e around it in different places which cross over the joining of the two bones, in order to recognize well the place of the first joining. Or else, with little shards of wood, pierce them, or ma coat the joinings with some clay, & dry. Press between them your hands joined between your two knees; & not with a press, because the bones would burst. Mold also at your leisure & two or three times, until you see that it is well pressed tightly together & well imprinted. And each time before replacing the piece, ponce with some willow charcoal, for it makes it release well. When you have cast, rub the medal with oil & with willow charcoal powder & with a brush, to make it dull. Guard against your medal being too greasy or oily, when you mold in cuttlefish bone. When you have cast, leave it to cool before taking the medal out, for when one takes it out hot, it brings with it some bone. And, cast moderately hot, something you will know when the bone is about to change its good whiteness. But when it is too hot, it really waxes the bone red. The proportion of lead & tin is as much one as the other. If the piece is difficult to come out, & of several pieces, make the cast forked with three or four grooves, and make & direct these grooves to the place of thickest parts. Also make these grooves around the medal, like directly on the head, for this attracts the metal & absorbs the figure best. Shake your frame a little when you have cast, and thus you will make very neatly several casts. Tin that is too hot burns the bone, which is corrupted. Also, once taken out du mohot from the mold, it risks breaking.
Figure
