ILLUSTRATIONS.
Friedrich Rathgen
FIG.
PAGE
1
.
Limestone block with well-preserved surface
3
2
.
Limestone block with pitted surface
3
3
.
Limestone block showing destruction of surface
4
4
.
Potsherd showing saline efflorescence
5
5
.
Pottery showing sodium nitrate efflorescence
6
6
.
Portion of horse-trappings showing blue and green patina
35
7
.
Head of Osiris showing advanced condition of warty patina
38
8
.
Etruscan mirror showing warty patina
40
9
.
Bronze figure showing destructive patina
42
10
.
43
11
.
The same after treatment (Finkener’s method)
44
12
.
45
13
.
Gay-Lussac’s burette
62
14
.
Air-pump fixed to water-tap
68
15
.
Apparatus for impregnation by extraction of air
69
16
.
Assyrian clay tablet showing incrustation
79
17
.
The same after treatment
79
18
.
19
.
Assyrian clay tablet before and after treatment
80
20
.
21
.
22
.
Babylonian clay cone before and after treatment
82
23
.
83
24
.
Water-bath for iron objects
94
25
.
Iron sword treated by Blell’s method
108
26
.
Iron spear-head treated by Blell’s method
109
27
.
Iron fibula treated by Blell’s method
109
28
.
Application of Krefting’s method
<
Clyx.com
