Betekenis van:
pumice stone

Voorbeeldzinnen

1. Pumice stone:
2. Pumice stone
3. Granulated pumice stone, washed in hydrochloric acid and ignited.
4. Industrial diamonds, pumice stone, emery and other natural abrasives
5. Granulated pumice stone boiled in hydrochloric acid, washed in water and dried.
6. Pumice stone; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated:
7. Precious and semi-precious stones, pumice stone, emery, natural abrasives, other minerals and precious metals
8. Precious and semi-precious stones; pumice stone; emery; natural abrasives; other minerals and precious metals
9. Collect the light petroleum extract in a dry, weighed flask containing fragments of pumice stone.
10. Pumice stone; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated
11. Where the oil or fat has to undergo subsequent quality tests, replace the fragments of pumice stone by glass beads.
12. Take 50 ml of the solution and place in a small, dry, weighed flask containing fragments of pumice stone.
13. Collect the light petroleum extract in a dry, weighed flask containing fragments of pumice stone. Distil off the solvent.
14. Industrial diamonds, unworked or simply sawn, cleaved or bruted; pumice stone; emery; natural corundum, natural garnet and other natural abrasives
15. Determine the lactose content according to Luff-Schoorl, as follows: add exactly 25 ml of Luff-Schoorl reagent (3.4) and two granules of pumice stone (3.5).