The manufacture of glass, also practised in Egypt, demanded a knowledge of sodium or potassium carbonates; the former occurs as an efflorescence on the shores of certain lakes; the latter was obtained from wood ashes.   anvd [Please select]

This glorious efflorescence goes on for five or six weeks.   anvd [Please select]

Efflorescence was removed from a concrete bridge at Washington, D.   anvd [Please select]

Their little chambers showed no efflorescence of rime, with which all the surrounding earth was coated.   anvd [Please select]

Efflorescence is due to certain salts leaching out of the concrete and accumulating into thin layers where the water evaporates on the surface.   anvd [Please select]

The most common place for efflorescence to appear in walls is at the horizontal junction of two days' work or where a coping is placed after the main body of the wall has been completed.   anvd [Please select]