Encara no tenim significats per a "powder pumice".
1Rub into the periphery a paste of sifted powdered pumice stone and water.
2The great sandy piazza, glittered as if strewn with powdered pumice.
3In Nebraska ash beds are found in twenty counties, and are often as white as powdered pumice.
4A superficial and imperfect polish may be given by grinding for a short time with powdered pumice stone.
5Sheets of zinc or of copper of a convenient size are carefully planished and polished with powdered pumice stone.
6Boiling alkaline solutions and a free use of powdered pumice and the scrubbing brush must on no account be neglected.
7The first coats should be rubbed with haircloth or curled hair, and the last with powdered pumice stone and raw linseed or crude oil.