The Collaborative International Dictionary of English v.0.48:

Boilary \Boil"a*ry\, n.
   See Boilery.
   [1913 Webster]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

BOILARY. A term used to denote the water which arises from a salt well,
belonging to one who has no right to the soil. Ejectment may be maintained
for it. 2 Hill, Ab. c. 14, Sec. 5; Co. Litt. 4 b.