
207
H
H
H
2
: See Hydrogen.
H
2
S: Hydrogen sulde.
H
2
SO
4
: See Sulfuric acid.
Habendum Clause: Denes the period of time for which the rights given
in the granting clause will extend. The habendum clause provides for a pri-
mary term that is a xed term of years during which the lessee has the right,
without any obligation, to operate on the premises. It also describes that a
secondary term is the extended period of time for which rights are granted
to the lessee once production is obtained.
Hadean: The oldest eon in Earth’s history. Extends from the origin of earth
to about 3.9 billion years ago.
Hague Rules (1921): Adopted by the International Law ...