Page:Popular Science Monthly Volume 40.djvu/314

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300
THE POPULAR SCIENCE MONTHLY.

ware by being fused into the body as in porcelain. The body and glaze being thus in constant antagonism to each other, produce sooner or later what is technically called "crazing" or cracking of the enamel, for the reason that the body is one thing, produced

Fig. 28.—Tête-à-tête set. Union porcelain Works.

at a higher temperature, and the glaze another, produced at a lower temperature, and not as in porcelain, body and glaze produced at the same time, and at the last and greatest heat.

Fig. 28 shows a tête-à-tête set, with head of Chinaman on the cover of the tea-pot, a negro's head on the sugar-bowl, and goat's head on the creamer.