(under the class definition) Processes of and instruments for placing material in general in the ground, comprising the forming of a cavity other than a furrow therein to receive the material and the depositing of the material in said cavity.
(1) Note. The cavity may be formed by removing earth or by displacing it, as by a piercing-tool.
SEE OR SEARCH CLASS
166, Wells, appropriate subclasses for wells for receiving fluids from the earth or inserting fluid into the pores of an earth formation.
