The CONTENTS.

v

VI.

History of Colours. Part I. Of Black .

Sect. I. General observations on black coloursSect. II. Native black colours - —

1. Black chalk - - -

2. Pit coal - - -

3. Black sands - -

4; Black head - -

5. Blnck-vegetable juices - -

6. Cuttle f{h ink - -

Sect. I II. Black produced by-fire - -

1. Charcoal blacks - -

■ 2. Soot blacks - -

3. Black 'metallic calces - -

Sect. IV. Black produced by mixture - -

1. Black from iron- - —

2 . Black from Jilver ■ - -

3.- Black front dead ■ - -

4; Black-from the combination of other coloursSect. V. Black paints, varnijhes, &c. -

1. Black paint with oil - --

2. Black paint with wat-er- -

3. Composition for marking seep -

4. Compos tion for;preserving wood, &c.

5. - Compositionsfor blacking leather -

6-. Spirit varnijlu -— -

7. Amber varnijhes j or- papier mac he, &c.

S.- Varnijh for metals - -

9 . Sealing wax - -

10. Printing ink - -

11. Polling press ink - -

Sect. V I. Of-the-preparation-of common writing ink —

1. Experiments j or determining the best preparation

of ink with vitriol and- astringents -. 37S

2. Compostion of ink deducedfrom the experiments 391

3. Of the preparation of the paper for durable

writings - -- - ^3

Page

3*5

3 l 7

32°

3 2 3

3 2 4

3 2 53 2 53 2 9

333

334

335339

343

34434435 °35 ?35435 6

35 6

357

359

362

365

366367.

369

37 °

37 1

37 6

77

B h

4. Attempts