s, and noting the effect whether the
soap solution becomes coloured and to what degree, or whether it
remains colourless, and also whether the colour of the swatch has
changed at all.

One very important point in connection with the soaping tests is
whether a colour will run into a white fabric that may be soaped along
with it. This is tested by twisting strands of the dyed yarn or cloth
with white yarn or cloth and boiling them in the soap liquor for ten
minutes and then noting the effect, particularly observing (p. 223)
whether the white pieces have taken up any colour.

Fastness to acids and fastness to alkalies is observed while carrying
out the various acid and alkali tests given above.

THE END.

INDEX. (p. 225)

#A.#

Acetate of ammonia, 93, 94, 101, 102, 127, 128, 129, 132, 167,
192, 194.
------- of chrome, 115.
------- of lime, 158, 159.

Acetic acid, 127.

Acid black, 37, 89.
---- ----- B, 92, 99.
---- ----- B B, 99, 111, 112.
---- ----- S, 90, 99.
---- blue 4 S, 98, 127.
---- ---- 1 V, 153.
---- dyes for blue, 152.
---- ---- for brown, 161.
---- ---- for green, 128.
---- ---- for mode colours, 165.
---- ---- for violet, 160.
---- dye-stuffs, 61.
---- green, 53, 91, 92, 127, 184, 189, 190, 192, 193.
---- ----- B, 128, 191.
---- ----- blue shade, 136.
---- ----- B N, 136.
---- ----- extra, 155.
---- ----- G G, 192.
---- magenta, 73, 105, 111, 113, 183, 190.
---- mauve, 96.
---- ----- B, 161.
---- red, test for, 214.
---- violet, 105.
---- ------ 4 B, 193.
---- ------ 5 B, 154, 160, 189, 191.
---- ------ 5 B E, 162.
---- ------ 6 B, 130, 171, 181.
---- ------ 10 B, 191.
---- ------ N, 92, 99, 161, 162.
---- ------ 6 R N, 161.
---- ------ 4 R S, 160.
---- ------ V, 162.
---- ------ 1 V, 153.
---- yellow, 53, 99, 123, 183, 190.

Acids, action on wool, 11.

Acridine red, 102.
-------- scarlet, 102.

Adjective group of dye-stuffs, 68.

Alizarine, 61, 69, 72, 73, 86, 114, 220.
--------- black, 99.
--------- ----- S W, 94, 113.
--------- blue, 116, 119, 166.
--------- ---- A, 158.
--------- ---- D N W, 131, 132, 133, 158, 164, 166.
--------- ---- S W, 108.
--------- Bordeaux, 133.
--------- -------- B, 98, 155.
--------- -------- G, 155, 159.
--------- brown, 131, 132, 133, 158, 164, 166.
--------- claret R, 118.
--------- colours, 77.
--------- cyanine, 111, 119, 156.
--------- -----