Pure nickel will remain nearly white, while "patent nickel," or nickel-copper will not retain its primitive brilliancy, but soon becomes slightly oxidized and grayish in color. The magnet furnishes a good means of testing. The unadulterated nickel is distinctly sensitive to magnetism, while that much alloyed is destitute of this property.

NICKEL ALLOYS

See Alloys.

NICKEL, TO REMOVE RUST FROM

See Cleaning Preparations and Methods.

NICKEL-PLATING

See Plating.

NICKEL STEEL

See Steel.

NICKELING, TEST FOR: See Plating.