752 LAWS OP MARYLAND [CH. 289

(11) "Beneficiary" means a husband, wife, child, chil-
dren or dependents of an employee in whom shall vest a
•right to receive payments under this Article.

(12) "Mining" means all underground workings by
shaft, drift, slope or otherwise, for the securing, removing,
and taking out from under the ground, coal, iron, ore,
clays and all other minerals and mineral substances, found
in and under the earth, and shall mean all work done by
any miner or employee working in and about said mines
in said shafts, slopes, headings, tunnels, rooms and other
subterranean places therein, for the purpose of obtaining
and removing therefrom all such minerals and mineral
substances, and the benefits of this Article shall be ex-
tended to any employee, or in case of his death, to his de-
pendent relatives, otherwise entitled, who shall be killed or
injured while so working or employed therein, and such
mine-worker shall be deemed to be wholly employed in the
State of Maryland, and entitled to the benefits of this Ar-
ticle, if the tipple, mouth or principal mine entrance in
and about which he works, is situated in this State, not-
withstanding such shaft, heading, slope or other subter-
ranean tunnel may extend underground into an adjoining
State, and notwithstanding such mine worker so employed
in this State may be killed or injured while working in
said mine beyond the lines of this State, and within the
lines of an adjoining State.

(13) "Occupational Disease" as used in this Article
shall mean [only the diseases enumerated and specified in
Section 21 of this Article. ] the event of an employee's be-
coming actually incapacitated, either temporarily, partially
or totally, because of an occupational A disease contracted
as the result of and in the course of employment, as pro-
vided in Section 22 of this Article.

(14) Whenever used in this Article "Silicosis" shall
mean the characteristic fibrotic condition of the lungs
caused by the inhalation of silicon dioxide (SiO₂) dust; and

"Asbestosis" shall mean the characteristic fibrotic condi-
tion of the lungs caused by the inhalation of asbestos dust.

(15) "Disablement", as used in Sections [21], 22, 27,
28 and 29 of this Article, means the event of an employee's
becoming actually incapacitated, either partly or totally,
because of an occupational disease, from performing his
work in the last occupation in which exposed to the hazards
of such disease; and "disability" means the state of being
so incapacitated. Disablement and disability in cases in-
volving occupational diseases shall be determined by the