the upper road to Jamesville, near the cross-road going to 
Onondaga Valley, (6) Carrigan’s Quarry, Skaneateles, (7) 
Behan’s Quarry, Manlius, (8) Alvord’s Quarry, Manlius, 
(9) at the falls three-fourths of a mile south of Manlius, 
on the East Branch, and one mile southwest of Manlius, 
on the West Branch of Limestone Creek. 
The economic importance of this group is considera- 
ble, neither is it limited to the immediate vicinity. Vast 
quantities of quicklime and of waterlime are manufactured 
and sent to all parts of the country. The blue limestone 
makes a good building stone, and is used extensively for 
that purpose. Large quantities of crushed stone are also 
exported. This article can be used for many purposes, 
the most important of which is in making solid founda- 
tions for the modern asphalt and macadamized pavements. 
It is also used extensively in the manufacture of the 
cement sidewalks which have recently become so popular. 
In the towns of Dewitt and Manlius, where the lower 
measures of the group occur, it is often used for farm 
fences. It is well adapted to this purpose, as the compar- 
atively thin layers are easily broken into oblong blocks, 
which a little skill will readily convert into good fences, 
THE DEVONIAN AGE. 
With the next period a new era, the Devonian begins. 
Like the Silurian, it has sometimes been divided into two. 
parts, the Lower and Upper Devonian Ages. These have 
usually been subdivided as follows: 
1. Oriskany Period. 
2. Corniferous Period. 
1. Hamilton Period. 
Upper Devonian. <2. Chemung Period. 
3. Catskill Period. 
The system commences with a sandstone formation, 
after which it is mostly composed of limestone and shale, 
Lower DEVONIAN. 
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