[Illustration: POTATO STARCH.]
[Illustration: ARROWROOT STARCH.]
[Illustration: WHEAT STARCH]
[Illustration: RICE STARCH]
[Illustration: SAGO STARCH]
[Illustration: INDIAN CORN STARCH]
[Illustration: TAPIOCA STARCH]
* * * * *
MARBLE AND MOSAIC.
[Footnote: A paper recently read before the Architectural Association,
London.--_From the Architect_.]
By T.R. SPENCE.
I do not propose to enter into any historical details as to the first
and subsequent application of mosaics. In a general sense we understand
mosaic as a combination of various more or less imperishable
materials--fixed together by cement or other adhesive substances--and
laid over walls, floors, etc., with a view to permanent decorative
effect. The substance of the tesserae is of many kinds, namely, glass,
cheap and precious marbles, hard stone, and burnt clay, these mentioned
being mainly in use for architectural purposes. For decorative schemes
we collect as many gradations of color as are obtainable in such durable
materials in their natural or manufactured state, and thus form a color
palette which we regard in the same sense as a painter would his
pigments.
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