See also:

• DIALYSIS (from the Gr. &0., through, Anew, to loosen)

DIALYSIS (from the Gr. &0., through, Anew, to loosen)  , in See also:

• CHEMISTRY
• CHEMISTRY (formerly "chymistry"; Gr. xvµela; for derivation see ALCHEMY)

chemistry, a See also:

• PROCESS

process invented by See also:

• THOMAS
• THOMAS (c. 1654-1720)
• THOMAS (d. 110o)
• THOMAS, ARTHUR GORING (1850-1892)
• THOMAS, CHARLES LOUIS AMBROISE (1811-1896)
• THOMAS, GEORGE (c. 1756-1802)
• THOMAS, GEORGE HENRY (1816-187o)
• THOMAS, ISAIAH (1749-1831)
• THOMAS, PIERRE (1634-1698)
• THOMAS, SIDNEY GILCHRIST (1850-1885)
• THOMAS, ST
• THOMAS, THEODORE (1835-1905)
• THOMAS, WILLIAM (d. 1554)

Thomas See also:

• GRAHAM, SIR GERALD (1831–1899)
• GRAHAM, SIR JAMES ROBERT GEORGE
• GRAHAM, SYLVESTER (1794-1851)
• GRAHAM, THOMAS (1805-1869)

Graham for separating colloidal and crystalline substances . He found that solutions could be divided into two classes according to their See also:

• ACTION

action upon a porous See also:

• DIAPHRAGM (Gr. Scat/pay,aa, a partition)

diaphragm such as See also:

• PARCHMENT

parchment . If a See also:

• SOLUTION (from Lat. solvere, to loosen, dissolve)

solution, say of See also:

• SALT (a common Teutonic word, cf. Dutch zout, Ger. Salz, Scand. salt; cognate with Gr. &Xs, Lat. sal)
• SALT, SIR TITUS, BART

salt, be placed in a See also:

• DRUM (early forms drome or dromme, a word common to many Teut. languages, cf. Dan. tromme, Ger. Trommel: the word is ultimately the same as " trumpet," and is probably onomatopoeic in origin; it appears late in Eng. about the middle of the 16th century)

drum provided with a parchment bottom, termed a " dialyser," and the drum and its contents placed in a larger See also:

• VESSEL (O. Fr. vaissel, from a rare Lat. vascellum, dim. of vas, vase, urn)

vessel of See also:

• WATER

water, the salt will pass through the membrane . If the salt solution be replaced by one of See also:

• GLUE (from the O. Fr. glu, bird-lime, from the Late Lat. gluten, glus, glue)

glue, See also:

• GELATIN, or GELATINE

gelatin or See also:

• GUM (Fr. gomme, Lat. gommi, Gr. Kµµ1, possibly a Coptic word; distinguish " gum," the fleshy covering of the base of a tooth, in O. Eng. gbma, palate, cf. Ger. Gaumen, roof of the mouth; the ultimate origin is probably the root gha, to open wide, seen in

gum, it will be found that the membrane is impermeable to these solutes . To the first class Graham gave the name " crystalloids," and to the second " colloids." This method is particularly effective in the preparation of silicic See also:

• ACID (from the Lat. root ac-, sharp; acere, to be sour)

acid . By adding hydrochloric acid to a dilute solution of an alkaline silicate, no precipitate will fall and the solution will contain hydrochloric acid, an alkaline chloride, and silicic acid . If the solution be transferred to a dialyser, the hydrochloric acid and alkaline chloride will pass through the parchment, while the silicic acid will be retained .