On Basaltic Glass.

The Chemical Gazette 325, 1.5.1856

By C. Stickel.

The author recommends the employment of basalt in the manufacture of glass. The applicability of basalt to this purpose has long been known in the glass-houses, but the author gives some determinate proportions by which glasses of certain properties may be obtained: —

1. Powdered basalt ... 10 drms.
Powdered white glass ... 10
Soda ... 25
Ashes ... 5
A very dark, brittle, ugly glass.

2. Basalt ... 10 drms. 0 grs.
Minium ... 5 0
Potashes ... 4 0
White arsenic ... 0 5
Useless.

3. Basalt ... 10 drms. 0 grs.
Quicklime ... 1 12
Potashes ... 2 48
Boracic acid ... 0 10
A nearly black, ugly, and very heavy glass, adapted for the decoration of monuments, stoves, &c.

4.
Glass No. 1 ... 5 drms. 0 grs.
Peroxide of manganese ... 0 12
After strong fusion it forms fine, dark brownish-red, hard, glassy fragments, like Delft or Wedgwood's ware. It is adapted for plates, syrup-vessels, &c.

5.
Basalt ... 5 drms. 0 grs.
Broken glass ... 10 0
Soda ... 10 0
Ashes ... 5 0
Peroxide of manganese ... 0 5
A beautiful light bottle-green glass, which is readily drawn into threads when fused. This was the most successful of all the experiments.

- Archiv der Pharm., lxxxv. p. 19.