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A diagram of action of diffraction grating.

Diffraction grating

A diagram of action of diffraction grating.

"Grille. San Giacomo de Rialto, Venice. GRILLE. A piece of openwork or grating, usually of metal, as wrought-iron." -Whitney, 1911

Grille

"Grille. San Giacomo de Rialto, Venice. GRILLE. A piece of openwork or grating, usually of metal, as…

A coin struck in the reign of queen Elizabeth.

Portcullis

A coin struck in the reign of queen Elizabeth.

A coin struck in the reign of queen Elizabeth.

Portcullis

A coin struck in the reign of queen Elizabeth.

"PORTCULLIS. A grating suspended by chains, used to defend the entrance to a castle." -Hall, 1862

Portcullis

"PORTCULLIS. A grating suspended by chains, used to defend the entrance to a castle." -Hall, 1862

A strong grating of timber or iron, somewhat resembling a harrow, made to slide in vertical grooves in the jambs of an enterance gate of a fortified place.

Portcullis

A strong grating of timber or iron, somewhat resembling a harrow, made to slide in vertical grooves…

"Scutching-machine or Scutcher for Flax. a, feed-table on which the flax is fed to the fluted rollers b, b', which seize it and present it to the scutches or beaters c, fastened by supports d to the rotating drum e. The latter revolves in a case f, with a grating at the bottom. The feed-rolls are driven by gearing i." -Whitney, 1911

Scutcher

"Scutching-machine or Scutcher for Flax. a, feed-table on which the flax is fed to the fluted rollers…

An illustration of a woman grating mandioca.

Woman with Grater

An illustration of a woman grating mandioca.