80. ROYAL SOCIETY OF CANADA 
gentleman I understand the Albertite was found quite unexpectedly 
in the more westerly of their several quarries, and not far from where 
the gypsum deposit is apparently cut off along a line of fault, the other 
side of which is a mass of conglomerate. The Albertite is in the form 
of veins, one of which has the maximum thickness of a little over an 
inch, and a length of about two feet, with two diverging branches. Others 
are smaller. In some instances the line of demarcation between the 
two minerals is clear and abrupt, the lustrous black Albertite coming 
out in strong contrast with the pure white alabaster, but in others the 
latter rock, for a few inches from the Albertite, is of a darker colour 
than elsewhere, and besides containing small fragments of Albertite, 
looks as though it were partly impregnated with bituminous matter. 
The vein is broken by numerous minute joints or fissures transerve to 
its general course, and now filled with thin films of gypsum, but the 
surrounding gypsum appears to be solid and compact. It is not easy 
to frame a theory which shall satisfactorily account for enclosures of 
this nature. I may add that I am in possession of a specimen, about 
two inches in diameter, in which crystals of selenite are apparently held 
together by a cement of Albertite, but have no certain knowledge of the 
circumstances of its occurrence. (See Plate.) 
(5) In Lower Carboniferous limestones. These calcareous beds in 
Albert county are intimately associated with the great gypsum deposits, 
which were probably derived therefrom. Both occupy a position at or 
near the summit of the formation, being followed directly by the gray 
beds of the Millstone-grit. They are usually flaggy, of a gray colour, 
and usually more or less impregnated with bituminous matter. In the 
museum of the University of New Brunswick are several large blocks 
of compact gray limestone, through which small angular or irregular 
masses of Albertite are distributed, and which are believed to have come 
from the vicinity of the Albert mine, while in limestones of the same 
formation occurring at Elgin geodes have been observed containing 
the same mineral. 
(6) In Carboniferous sandstones. At a number of points between 
the Albert mines and Hillsborough the nearly flat, flaggy and bitumin- 
ous limestones noted above may be seen to be capped by gray sandstones, 
marking the beginning of the coal formation. In several places these 
contain veins of Albertite, usually in the form of disseminated grains, 
but occasionally, as at the old East Albert mine in Lower Hillsboro, 
in veins sufficiently large to have led to their removal. As in the case 
of the gypsum referred to above, it is interesting to note that in many 
cases the Albertite, though clinging to the sandstone, is sharply and 
completely separated from the latter, no traces of the first named 

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