100 
MINUTES OE PROCEEDINGS OF 
Colonel YounglinsbancPs machine was an ordinary shaking screen, but it was 
found that the mesh for taking out the small and flakey pebbles was apt to choke 
up and interfere with its proper action. One of the foremen of the Machinery 
Department suggested that a reel would be more suitable. This was applied 
to the new machine with the oblong mesh described, and has been found to 
work very satisfactorily. A reel of the same sort is now being fitted to Colonel 
YounghusbancVs machine. The following figure will give an idea of this reel:— 
Fig. 10. Scaled. 
Before closing the work of 1872, the following samples of the firing of 
mixtures of Waltham Abbey powder may be given to show how satis¬ 
factorily the system of mixing has worked. 
The hopper described was brought into operation in January 1872, and 
the following are some of the mixtures made with it:— 
| 
No. of i 
Experiment. 
Pressures. 
Brand. 
nor 
Density. 
M.V. 
barrels. 
Date. 
No. 
A. 
B. 
C. 
c 
23. 
1. 72 
1-760 
51 
— 
755 
1470 
18-9 
19-2 
17.1 
127... ] 
19. 
2. 72 
1-753 
127 
— 
738 
1397 
16-0 
16-0 
14-8 
l 
26. 
2.72 
1-749 
62 
— 
774 
1462 
19-0 
18-2 
17-6 
Mean... 
1432 
17-4 
17-3 
16-0 
No. 127 . 
240 
13. 3.72 
795 
1432 
17-4 
16-7 
15-6 
2. 
4. 72 
1-737 
44 
12. 4. 72 
905 
1481 
21-1 
20-5 
18-5 
3. 
4. 72 
1-768 
48 
12. 4. 72 
906 
1396 
17-5 
179 
16-2 
4. 
4. 72 
1-753 
46 
12. 4. 72 
907 
1432 
17-2 
16-8 
15-8 
(. 
8. 
4. 72 
1-758 
48 
12. 4. 72 
911 
1452 
20-1 
19-4 
18-9 
Mean... 
1434 
19-0 
18-6 
17-5 
No. 137 . 
186 
19. 4. 72 
916 
1429 
18-6 
18-3 
17 0 
C 
10. 
4. 72 
1-736 
45 
19. 4. 72 
913 
1465 
21-0 
20-0 
17-9 
153 ... < 
29. 
4. 72 
1-751 
47 
10. 5.72 
929 
1464 
21-3 
20-8 
18-6 
15. 
5. 72 
1-782 
47 
23. 5. 72 
976 
1403 
13-2 
12-9 
12-4 
L 
16. 
5. 72 
1-785 
48 
23. 5. 72 
977 
1405 
15-1 
14-8 
13-9 
Mean... 
1431 
17-6 
17-1 
15-7 
No. 153 . 
187 
6. 6. 72 
1018 
1437 
17-4 
17-1 
15-5 
224 ... £ 
29. 
8. 72 
1-764 
43 
13. 9. 72 
11 
1514 
20-4 
18-0 
18-0 
31. 10. 72 
1-774 
47 
8. 11. 72 
108 
1433 
14-9 
15-0 
14-9 
Mean... 
1471 
17-5 
16-4 
16-3 
No. 224 . 
“90 
13.'12. 72 
164 
1472 
17-1 
16-6 
16-9 
225 ... £ 
31. 
1. 
8. 72 
11. 72 
1-776 
1-796 
43 
46 
13. 9. 72 
8. 11. 72 
13 
109 
1539 
1416 
22-0 
13-6 
20-9 
13-8 
20-0 
14-2 
Mean... 
1480 
18-2 
17*6 
17-3 
No. 225 . 
"89 
13.12. 72 
165 
1469 
17-9 
16-8 
17-4 
