Chapter CLX: Section 108: Filtering

=Through porous pots.=

=Through porous solids,= such as charcoal.

=Through pumice stone,= chalk, &c.

=Through porous fabrics,= flannel, paper, &c.

=Through sponge,= spongy platinum.

=Through sand,= gravel, calcined ores, &c.

=Through wire gauges,= hair gauge, &c.

=Reversible filters,= such as the “Thames,” &c., are made
self-cleansing by reversing the flow for a short time through a waste
pipe, thus washing out the deposit.

=2603. Filtering cone,= formed of wire cloth inside a pipe.

LONDON: PRINTED BY WILLIAM CLOWES AND SONS, LIMITED.

GREAT WINDMILL STREET, W., AND DUKE STREET, STAMFORD STREET, S.E.

Transcriber’s Notes

Inconsistent spelling and hyphenation have been retained, except as
mentioned below. The use of (linear) feet as unit of area has not been
corrected.

Page 18-20: There is no separate description for Number 82.

Page 220, Number 1769, ... and other machinery: possibly a mistake for
... and other materials.

Page 228-230, Number 1854: there is no description for this item;
presumably it is the same as that for Number 1855 (Bevilled flat
iron).

Sections 107 and 108 may be found at the end of Part II.

Changes made:

Some obvious minor typographical errors have been corrected silently.

Letters referring to elements in illustrations and characters
representing shapes rather than letters have been standardised to
~sans-serif~.

In several instances, ditto, do. and „ have been replaced with a
repetition of the dittoed text.

Page 40: Eilipile has been changed to Eolipile.

Page 320: 75° has been changed to 75,

End of Project Gutenberg's The Engineer's Sketch-Book, by Thomas Walker Barber