Tabular view of the composition of several kinds of Glass.
| No. 1. | No. 2. | No. 3. | No. 4. | No. 5. | No. 6. | No. 7. | No. 8. | No. 9. | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Silica | 71·7 | 69·2 | 62·8 | 69·2 | 60·4 | 53·55 | 59·2 | 51·93 | 42·5 | |||
| Potash | 12·7 | 15·8 | 22·1 | 8·0 | 3·2 | 5·48 | 9·0 | 13·77 | 11·7 | |||
| Soda | 2·5 | 3·0 | 3·0 | S. pot. | ||||||||
| Lime | 10·3 | 7·6 | 12·5 | 13·0 | 20·7 | 29·22 | 0·5 | |||||
| Alumina | 0·4 | 1·2 | 3·6 | 10·4 | 6·01 | 1·8 | ||||||
| Magnesia | 2·0 | - | 2·6 | 0·6 | 0·6 | |||||||
| Oxide of iron | 0·3 | 0·5 | 1·6 | 3·8 | 5·74 | 0·4 | ||||||
| — manganese | 0·2 | 1·0 | ||||||||||
| — lead | 28·2 | 33·28 | 43·5 | |||||||||
| Baryta | 0·9 | |||||||||||
| No. 1. | No. 2. | No. 3. | No. 4. | No. 5. | No. 6. | No. 7. | No. 8. | No. 9. | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Silica | 71·7 | 69·2 | 62·8 | 69·2 | 60·4 | 53·55 | 59·2 | 51·93 | 42·5 | |||
| Potash | 12·7 | 15·8 | 22·1 | 8·0 | 3·2 | 5·48 | 9·0 | 13·77 | 11·7 | |||
| Soda | 2·5 | 3·0 | 3·0 | S. pot. | ||||||||
| Lime | 10·3 | 7·6 | 12·5 | 13·0 | 20·7 | 29·22 | 0·5 | |||||
| Alumina | 0·4 | 1·2 | 3·6 | 10·4 | 6·01 | 1·8 | ||||||
| Magnesia | 2·0 | - | 2·6 | 0·6 | 0·6 | |||||||
| Oxide of iron | 0·3 | 0·5 | 1·6 | 3·8 | 5·74 | 0·4 | ||||||
| — manganese | 0·2 | 1·0 | ||||||||||
| — lead | 28·2 | 33·28 | 43·5 | |||||||||
| Baryta | 0·9 | |||||||||||
No. 1. is a very beautiful white wine glass of Neuwelt in Bohemia.
No. 2. Glass tubes, much more fusible than common wine glasses.
No. 3. Crown glass of Bohemia.
No. 4. Green glass, for medicinal phials and retorts.
No. 5. Flask glass of St. Etienne, for which some heavy spar is used.
No. 6. Glass of Sèvres.
No. 7. London glass employed for chemical and physical purposes.