To 100 lbs. of batch add
8 ounces best oxide of uranium,
1 dr. oxide of copper.
The common colors of purple, blue, emerald, or green, are too well
known to require to be repeated here.
The following receipt for crystal glass is on the European standard,
viz.:--
1200 lbs. silex,
800 " red lead,
440 " pearlash,
50 " nitre,
10 " phosphate of lime,
10 oz. white oxide of antimony,
24 " manganese,
32 " arsenic,
20 " borax.