Apparatus used for distillation, separating liquid from the impurities contained in it. A, reservoir; B, light for heating; C, connecting tube; D, steam passes into; E, pipe where cold water is supplied; F, discharged liquid; H, pure water.

Distillation

Apparatus used for distillation, separating liquid from the impurities contained in it. A, reservoir;…

Any substance, as cloth, paper, porous porcelain, or a layer of charcoal or sand, through which liquid or gas is passed to remove suspended impurities or to recover solids.

General Purpose Filter

Any substance, as cloth, paper, porous porcelain, or a layer of charcoal or sand, through which liquid…

"A filter to strain out the germs at the house tap. Such a filter must be cleaned and boiled weekly." —Davison, 1910

Tap water filter

"A filter to strain out the germs at the house tap. Such a filter must be cleaned and boiled weekly."…

There are many different kinds of funnels that have been adapted for specialized applications in the laboratory. Filter funnels, thistle funnels, and dropping funnels have stopcocks which allow the fluids to be added to a flask slowly.

Roost Funnel

There are many different kinds of funnels that have been adapted for specialized applications in the…

An illustration of a section of a sand-filter bed.

Sand-Filter Bed

An illustration of a section of a sand-filter bed.

"A sandy stratum, a a, acting as a filter, occupies an inclined position between two other strata impervious to water, such as clay, the water being absorbed by the superficial parts of the strata, as at a a (which may be of very great extent), will penetrate through its whole depth, and, finding no egress below on account of the basin-like form of the stratum, or from its resting at the lower termination upon a compact rock, will accumulate." — Wells, 1857

Sandy Stratum

"A sandy stratum, a a, acting as a filter, occupies an inclined position between two other strata impervious…

A filter, sieve, or the like for straining liquids.

Pulp Separation Strainer

A filter, sieve, or the like for straining liquids.