February, 1920 
65 
The China known 
Haviland 
is stamped under each piece 
under^laze 
since 1840 as 
China 
The Decorated China has an 
additional stamp on the glaze 
- Haviland & Co. 
ro\snd«<l 1837 
11 E.AST36fh STREET .NEW YORK 
10 EAST 37th STREET 
i 
Composition of Haviland China 
The body of Haviland china is composed of 5o% alumina and 5o% feldspar rock, and the glaze is pure 
feldspar rock. - Body and glaze are fired together and both are vitrified at a temperature of 1800 
degrees Centigrade - or 3280 degrees Fahrenheit. 
The body and glaze of earthenvvare, and of English china.are fired separately at different temperatures 
and their glaze being composed of lead, borax and sand, is fusible at a much lower temperature 
than feldspar, and is therefore much less resistant and durable. 
Even when chipped, Haviland china can never absorb dishwater or grease or any other substance 
the body being entirely vitrified. 
Hav^and china is heavier than English China - although not thicker - for the same reason that 
quartz is heavier than limestone, weight being always in proportion to the density of vitrification. 
