----------------------+--------------------------------
| Silica (only slightly soluble) | Silica (only slightly soluble).
| Alumina | Alumina.
| Oxide of Tin | Oxide of Tin. _
| Baryta | Baryta \
| Strontia | Strontia \
| Lime | Lime |
| Magnesia | Magnesia |With an
| Glucina | Glucina }intermittent
| Yttria | Yttria |flame
| Zirconia | Zirconia |opaque-
| Thoria | Thoria only when |white.
| | saturated /
| Oxide of Lanthanum | Oxide of Lanthanum/
| " " Cerium | " " Cerium.
| " " Didymium | " " Didymium.
| " " Manganese | " " Manganese.
| Tantalic Acid _ | Tantalic Acid.
| Oxide of Silver \ | Oxide of Silver _
| " " Zinc \ | " " Zinc \ After
| " " Cadmium | After long | " " Cadmium \ long
| " " Lead } continued | " " Lead | continued
| " " Bismuth | blowing. | " " Bismuth } blowing.
| " " Antimony | Otherwise grey. | " " Antimony | Otherwise
| " " Nickel / | " " Nickel / grey.
| Telluric Acid _/ | Telluric Acid _/
--+--------------------------------------+--------------------------------
Yellow, red, and brown.
--+--------------------------------------+--------------------------------
| Oxide of Iron, red | Oxide of Iron.
| Titanic Acid, yellow |
| Pelopic Acid, brown | Pelopic Acid.
| Ferruginous Titanic Acid, blood red | Ferruginous Titanic Acid.
| " Niobic " " | " Niobic "
| " Pelopic " " | " Pelopic "
| " Tungstic " " | " Tungstic "
| Vanadic Acid, brownish |
| Oxide of Chromium, reddish |
--+--------------------------------------+----------------