306 REPORT—1840. 
Taste No. XIV. Showing the Chemical and Physical Properties 
L. 2. 3. 4, 5. 6. 
€ Chemical Composition by Weight) Atomic — 
% Constitution. per cent. Weight. g Colour, and order of 
ey = Intensity. 
6 — e+ &— e+ WH1 | a 
- a 
2 a 
1 Cu + 100:00 + 0 | 31:6 | 8-667 | Tile-red. 
2)/10Cu+ Zn 90-704 9:30 | 348°3 | 8-605 | Reddish yellow 1 
3; 9Cu+ Zn 89:80+4 10:20 |316°7 | 8-607 | Reddish yellow 2 
4} 8Cu+ Zn 8860+ 11-40 | 285-1 | 8-633 | Reddish yellow 3 
5 7 Cu + Zn 87:30 + 12°70 | 253-4 | 8-587 | Reddish yellow 4 
6} 6Cu+ Zn} 85:40+4 14°60 | 221-9 | 8-591 | Yellowishrel 3 
7; 5Cu+ Zn} 83:02+ 16-98 | 190-3 | 8-415 | Yellowishred 2 
8} 4Cu+ Zn} 7965+ 20°35 | 158-7 | 8-448 | Yellowish red 1 
9} 3Cu+t Zn | 7458+ 25-42 | 127-1 | 8-397 | Pale yellow. 
10 2 Cu + Zn 66°18 + 33°82 | 95-5 | 8-299 | Full yellow 1 
11 Cu+ Zn | 49:47-+ 50°53 | 63-9 | 8-230 | Full yellow 2 
12 Cu+ 22Zn | 382:85-+ 67:15 | 96-2 | 8-283 | Deep yellow. 
13} 8Cu+17 Zn | 3152+ 68-48 | 801-9 | 7-721 | Silver-white 1 
14} 8Cu+4+ 18 Zn | 3030+ 69-70 | 834-2 | 7-836 | Silver-white 2 
15} 8Cu+19 Zn | 29:17+4 70-83 | 866-5 | 8-019 | Silver-gray 3 
16 | 8 Cu+ 20 Zn | 28:12-+4 71-88 | 898-8 | 7-603 | Ash-gray 3 
17} 8Cu+21 Zn | 27:10+4 72-90 | 931-1 | 8-058 | Silver-gray 2 
18 | 8 Cu+ 22 Zn | 2624+ 73:76 | 963-4 | 7-882 | Silver-gray 1 
19} 8 Cu+ 23 Zn | 25:39-+ 74:61 | 995-7 | 7-443 | Ash-gray 4 
20 Cu+ 32Zn | 2450+ 75:50 | 128-5 | 7-449 | Ash-gray 1 
21 Cu+ 4Zn | 1965+ .80:35 | 160°8 | 7-371 | Ash-gray 2 
22 Cu+ 5 Zn | 16364 83-64 | 193-1 | 6-605 | Very dark gray. 
23 + Zn 0 + 100-00 | 32°3 | 6°895 | Bluish gray. 
TaB_eE No. XV. Showing the Chemical and Physical Properties 
1 Cu + 100-00 + 0 | 31-6 | 8-667 | Tile-red. 
2); 10Cu+ Sn | 84:29-+4 15:71 | 374-9 | 8-561 | Reddish yellow 1 
3} 9Cu+ Sn} 8281+ 17:19 | 343-3 | 8-462 | Reddish yellow 2 
4} 8Cu+ Sn] 81:10+4 18-90 | 311-7 | 8-459 | Yellowish red 2 
5| 7Cu+ Sn 7897+ 21-03 | 280-1 | 8-728 | Yellowishred 1 
6| 6Cu+ Sn| 7629+ 23-71 | 248-5 | 8-750 | Bluish red 1 
7 5 Cu + Sn 72:30 + 27:20 | 216-9 | 8575 | Bluish red 2 
8} 4Cu+ Sn} 68214 31:79 | 185-3 | 8-400 | Ash-gray. 
9} 3Cu+ Sn | 61694 38°31 | 153-7 | 8-539 | Dark gray. 
10}; 2Cu+ Sn |} 51-75-+ 48-25 | 122-1 | 8-416 | Grayish white 1 
ll Cu+ Sn |} 84:92+ 65-08 | 90-5 | 8-056 | Whiter still 2 
12 Cu + 28Sn | 21:15+4 78-85.| 149-4 | 7-387 | Whiter still 3 
13 Cu+ 38n | 15:17+4 84-83 | 208-3 | 7-447 | Whiter still 4 
14 Cu+ 4Sn 11°82 4+ 88-18 | 267-2 | 7-472 | Whiter still 5 
15 Cu+ 5Sn 9°68 + 90°32 | 326-1 | 7-442 | Whiter still 6 
16 + Sn 0 + 100-00 | 58-9 | 7-291 | White 7 
Abbreviations used in column 7th to denote character of fracture :— 
F.F. Fine Fibrous. C.Conchoidal. V.C. Vitreo-Conchoidal. V. Vitreous. 
are = 1. The numbers in column 6th denote intensity of shade of the 
specific gravities were determined by the method indicated in Report ‘‘ On 
The ultimate cohesion was determined on prisms of 0°25 of an inch square, 
given are those which each prism just sustained for a few seconds before 
