il.J NEW YORK. 265 
Analyses of cement-making materials used < it Hudson, N. )'. 
pica (Si0 2 ) 
tlumina (A1 2 3 ) . 
ron oxide ( Fe 2 3 ) 
Jme(CaO) 
Magnesia (MgO) . 
Shale. 
Clay. 
54. 70 
64.30 
58.90 
52.00 
I 31.68 
33. 60 
27. 50 
81.00 
1.15 
1.46 
4. OH 
7. 10 
n.d. 
1.30 
.71) 
3. 33 
52.10 
35. 56 
5. 90 
3. 88 
The Iroquois Portland Cement Company has recently built a plant 
lear Caledonia, Livingston County. Marl from a deposit near the 
)lant is mixed with clay brought from Canawangus, Genesee County. 
k>th materials are dried before mixing. Analyses of the raw mate- 
•ials follow: 
Analyses of cement-making materials used mar Caledonia, N. Y. 
Clay, 
mica (Si0 2 ) 
Llumina (A1 2 3 ) 
ron oxide (Fe 2 3 ) ... 
ime (CaO) 
Magnesia (MgO) 
Sulphur trioxide (S0 3 ) 
Marl. 
0.4 
. 2 
.2 
58.5 
.3 
1.7 
62.5 
20.2 
7.5 
.8 
1.8 
.4 
After having disposed of their plant at Warners, Onondaga County, 
o the Empire Portland Cement Compan}^, T. Milieu & Co. erected 
:heir present plant at Wayland, Steuben County, which commenced 
rodiu'ing in October, 1892. The works were destroyed by fire in 
uly, 1893, but were rebuilt and began shipping again in October, 1893. 
The materials used are marl and clay. The marl is obtained from a 
pwamp near the mill, about 185 acres of marsh land being owned by 
if he company. The marl deposit is about 6 feet thick. Unlike the 
Onondaga County deposits, however, the marl bed is not underlain by 
b ,lay, and the latter material has to be brought from a bank near 
Mount Morris, in Livingston County. The clay deposit there worked 
s one of a series which occur in the terraces bordering Canaseraga 
Creek and Genesee River, extending more or less continuously from 
Dansville nearly to Rochester, The clay for cement is worked at a 
ijpoint about 4 miles south of Mount Morris, and is shipped over the 
Delaware, Lackawanna and Western Railroad to the works, a distance 
of about 20 miles. 
The clay is dried over steam coils, ground in a Potts disintegrator, 
and mixed with the marl in a revolving mixer. The slurry is then 
passed through pug mills and made into bricks. These bricks are 
