CANARY.
| 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. |
GERMAN SHEET GLASS.
| 400 |
lbs. |
silex, |
| 126 |
" |
hydrate of lime, |
| 4 |
" |
charcoal, |
| 7 |
" |
nitrate of soda, |
| 4 |
" |
arsenic, |
| 1 |
" |
manganese. |
Gold-colored spangles may be diffused through
the glass by mixing gold-colored talcs in the batch.
AGATE.
| To 150 |
lbs. |
flint batch add, |
| 10 |
" |
phosphate of lime, |
| 6 |
" |
arsenic. |
|
