Plaster - Judgment Search Results

Pickering Vs. Mccullough

Court: US Supreme Court

..... my said invention consists in the manufacture of crucibles in a plaster mold which gives shape to the pot externally and absorbs the ..... splitting or cracking from unequal contraction in drying i mount my plaster mold in a revolving chuck and employ a rib attached to ..... operation repeated the crucible and mold are set aside when the plaster of the mold has absorbed the moisture from the crucible and .....