86 NEW YORK STATE MUSEUM 
of the first one and about the same length has been worked to a 
depth of from 40 to 65 feet. In 1912, the development of a third 
quarry was begun, situated to the west of the latter with which 
it will eventually connect. This covers an area of 100 feet square. 
The quarries are equipped with three channelling machines, two 
gadders and two derricks. 
The marble is mostly of the darker grades, the average being 
darker than that found in the other quarries, and is also finer 
grained. It is sold under the name of “ Northern New York,” 
with three grades depending on the relative presence or absence 
of lighter streaks in the dark blue ground. It is mainly in demand 
for monumental work. A good proportion of the lighter grade 
is not polished, but hammer faced, and then makes a close imita- 
tion of granite. 
In the ppper 15 feet, the marble shows open joints and ‘fissures 
along which more or less weathering and discoloration has taken 
place. A few fissures reach below that depth, but for the most 
part the stone is uniform and quite solid. There are a few knots 
in the quarry walls, which arise from silicate inclusions; they 
tarely exceed a foot im diameter. ‘The stiriace of the marble 
shows deep groovings from glacial erosion. 
[he company’s mill is situated at the quarries and is equipped 
with ten gangs and a rubbing bed. The larger part of the output 
of monumental marble is shipped in polished form. 
The Gouverneur Marble Co. The Gouverneur Marble Co. 
owns quarries on the northeastern section, adjoining those of the 
St Lawrence Company. Its principal development is an opening 
250 feet long and nearly as wide which has been worked to an 
average depth of 50 feet. This is being extended by a smaller 
connecting quarry 125 feet long and 50 feet wide on the south- 
east. The beds dip northwest 10° or so and have a pitch to the 
northeast. The jointing is mainly in two systems N. 40° W. and 
N..50° E. dividing the marble into rectangular blocks. A test hole 
was put down in the smaller quarry to a depth of 95 feet and is said 
to have shown a good quality of marble for that distance. 
The product runs mostly to the medium and light sorts, but 
some good dark is being extracted from the more southerly sec- 
tion. The lighter colors are often beautifully mottled or veined. 
A considerable part of the product goes for building stone which 
is shown in churches and schools in various parts of the State. 
The quarry equipment comprises a derrick, two channelers and 
a gadder. The mill has eleven gangs of saws. 
