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Dredging is an excavation activity or operation usually carried out at least partly underwater, in shallow seas or fresh water areas with the purpose of gathering up bottom sediments and disposing of them at a different location.

Excavating Purpose Dredger

Dredging is an excavation activity or operation usually carried out at least partly underwater, in shallow…

"Sulphurators are instruments for distributing flowers of sulphur, for the purpose of destroying mildew. In the case of greenhouse plants, such as heaths, simply dusting with sulphur through a muslin bag or dredger is sufficient." — Encyclopedia Britannica, 1893

Epps's Sulphurator

"Sulphurators are instruments for distributing flowers of sulphur, for the purpose of destroying mildew.…

"Sulphurators are instruments for distributing flowers of sulphur, for the purpose of destroying mildew. In the case of greenhouse plants, such as heaths, simply dusting with sulphur through a muslin bag or dredger is sufficient." — Encyclopedia Britannica, 1893

Sulphurator

"Sulphurators are instruments for distributing flowers of sulphur, for the purpose of destroying mildew.…