STATE GEOLOGIST. 55 
This monument is a monolith, cast where it stands from Buckeye 
Portland cement. It is 26 feet high and 14 feet square and weighs about 
100 tons. 
Mr. Cushman has made’a careful study of Portland cement in con- 
nection with outdoor monumental work with a view of finding something 
more durable than marble and granite, and he believes that Portland 
cement fills his desires in that direction. 
ROPE MOLDING. 
Among other ornamental features, the Aberthaw Construction Co.. 
of Boston, now make a cast stone rope molding in two styles, smooth and 
rough finish. Like other ornamental designs this can be made in any 
color. : 
MOSAIC WORK. 
For mosaic work, small colored pieces of encaustic tile, glass, marble, 
onyx, ornamental stones, or previously hardened pieces of colored cement 
are arranged in various patterns and cloth netting is glued or cemented 
over the face with some soluble cement. These flexible sheets of mosaic 
design called “Corded Ceramic Mosaic” are then ready for the bed stone 
of cement mortar. This bed plate is made of 1 part of Portland cement 
and 2 parts of sand, mixed quite wet. The sheet is then laid upon the 
fresh mortar and pressed down into it until the mortar has risen between 
the pieces up to the level of the sheet; the sheet is then soaked loose, the 
position of the pieces adjusted so as to secure uniform mortar joints and 
the plate is then allowed to set. The trimming of rough surfaces or 
polishing, if any is required, is done when the cement has hardened. The 
mosaic plate is then ready for use. When complete, it is about two 
inches thick. 
Terrazo work is that form of mosaic which is made by setting in a 
ground of colored mortar, small irregular pieces of colored marble, glass, 
tile or granite. Or, the pieces may be mixed with the mortar and the 
surface ground and polished after the mortar has set. A central design 
may also be bordered in this irregular work. 
TILES AND FIGURED WORK. 
Floor tiles, rivaling in appearance and durability those made of 
burned clay are made from cement. Generally this is done under the 
protection of patents covering the press or dies or some feature of the 
process. A single tile may be of one solid color, or may be made of 
several different colored cements accurately disposed in geometrical or 
other forms. These different colors are prepared by grinding the cement, 
coloring material and fine sand intimately together, dry. They are 
then filled into a cellular or honey-comb die, each compartment of the die 
receiving its charge of the proper color by means of perforated cards or 
