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Marsh test

(Encyclopedia)Marsh test, method for the detection of arsenic, so sensitive that it can be used to detect minute amounts of arsenic in foods (the residue of fruit spray) or in stomach contents. The sample is placed...

potassium nitrate

(Encyclopedia)potassium nitrate, chemical compound, KNO3, occurring as colorless, prismatic crystals or as a white powder; it is found pure in nature as the mineral saltpeter, or niter. (The name saltpeter is also ...

Polotsk

(Encyclopedia)Polotsk pôˈlətsk [key], city (1989 pop. 76,837), W Belarus, on the Western Dvina River at its confluence with the Polota. It is a large rail junction and agricultural trade center. Manufactures inc...

Tochigi

(Encyclopedia)Tochigi tōˈchĭgē [key], prefecture (1990 pop. 1,935,186), central Honshu, Japan. Utsunomiya (the capital), Ashikaga, Oyama, Kanuma, and Sano are the chief cities. Its many fertile river plains yie...

Breda

(Encyclopedia)Breda brādäˈ [key], city, North Brabant prov., S Netherlands, at the confluence of the Mar...

Roanoke, city, United States

(Encyclopedia)Roanoke rōˈənōk [key], city (1990 pop. 96,397), independent and in no co., SW Va., on the Roanoke River; settled c.1740, inc. 1882, as a city, 1884. It is situated between the Blue Ridge and Alleg...

eczema

(Encyclopedia)eczema ĕkˈsəmə [key], acute or chronic skin disease characterized by redness, itching, serum-filled blisters, crusting, and scaling. Predisposing factors are familial history of allergic disorders...

Coimbatore

(Encyclopedia)Coimbatore kwĭmbətôrˈ [key], city, Tamil Nadu state, SE India. Commanding the eastern approach ...

Frankland, Sir Edward

(Encyclopedia)Frankland, Sir Edward, 1825–99, English chemist. He studied under Bunsen and Liebig and taught at several English institutions. In working on the synthesis and isolation of compounds he evolved the ...

Hammond

(Encyclopedia)Hammond. 1 City (2020 pop. 77,879), Lake co., extreme NW Ind., bounded by Lake Michigan, the Ill. state line, and the Little Calumet River, and ...