THE ROYAL ARTILLERY INSTITUTION, 
100 
This is most excellent powder* and it will be observed that the density is 
high and the powder consequently difficult to dry. 
The following are proofs of pebble re-worked from Hall and Soffis L.G.:— 
Stoving. 
Density. 
Moisture. 
No. of 
pebbles 
to 1 lb. 
Experiment. 
M. V. 
Pressures. 
Date. 
No. 
A. 
B. 
C. 
28. 11. 73 
1. 12. 73 
1-789 
1-797 
1*20 
1-11 
76 7 
76 5 
8. 12. 73 
785 
1432 
14-8 
15-0 
14-6 
9. 12. 73 
10. 12. 73 
1-792 
1*796 
1-37 
1-07 
76 7 
82 j 
15.12. 73 
790 
1454 
15-9 
15-6 
15-1 
These stovings were dried 36 hours at 127°. 
At this time* and for some months previously* it was the rule to prove 
double stovings instead of proving each separately* and this is attended with 
no inconvenience ; for even if a double stoving fails* there is still opportunity 
in the four-way hopper of mixing it with another double stoving of an op¬ 
posite character. 
It will be seen that the question of stoving is a very important one. What 
is required is to give the powder that amount of stoving which will leave it 
in a normal condition as regards moisture* so that afterwards the velocity 
shall not be affected. In order to obtain some data on this point* 10 barrels 
were dried 72 hours at 125° Tah. and fired once a month. 
Stoving. 
Density. 
Mois¬ 
ture. 
Experiment. 
M. Y. 
Pressures. 
Corrected 
M. Y. 
Pressures. 
Date. 
No. 
A. 
B. 
C. 
A. 
B. 
C. 
31. 5. 72 
• 1-773 
*77 
12. 6. 72 
1038 
1502 
20-4 
19-8 
188 
_ 
_ 
_ 
_ 
■ if 
n 
— 
12. 7. 72 
1107 
1490 
19-3 
19-5 
18-6 
— 
— 
— 
_ 
„ 
n 
— 
7. 8.72 
1157 
1473 
19-3 
18-4 
16-5 
— 
— 
_ 
_ 
n 1 
n 
— 
13. 9.72 
7 
1515 
22-6 
22-4 
19-4 
— 
_ 
_ 
_ 
.a 
ii 
— 
9. 10. 72 
57 
1520 
20-4 
19-0 
18-9 
1523 
20-4 
19-0 
18-9 
,. , n 
n 
1-28 
18. 11. 72 
121 
1501 
18-2 
18-2 
17-1 
1507 
18-3 
18-3 
17-2 
11 
„ 
1-17 
13. 12. 72 
166 
1499 
19-4 
19-2 
17-4 
1507 
19-5 
19-3 
17-5 
n 
„ 
1-33 
9. 1. 73 
225 
1511 
19-5 
20-0 
19-3 
1522 
19-7 
20-2 
19-5 
n 
ii 
1-38 
10. 2. 73 
297 
1486 
17-9 
17-5 
17-8 
1501 
18-2 
17-8 
18-1 
n 
R\ 
1*35 
12. 3. 73 
398 
1486 
19-3 
18-3 
17-4 
1506 
19-7 
18-7 
17-8 
>/ 
„ 
1-30 
10. 4.73 
501 
1474 
16-8 
16-6 
16-5 
1499 
17-3 
17-1 
17-0 
n 
„ 
1-16 
14. 5.73 
544 
1495 
18-3 
18-9 
17-8 
1522 
18-8 
19-4 
18-3 
n 
a 
1-3 
19. 6.73 
603 
1493 
19-8 
19-7 
18-2 
1523 
20-4 
20-3 
18-8 
n 
„ 
•95 
15. 7.73 
657 
1485 
18-9 
18-5 
17-5 
1518 
19-5 
19-1 
18-1 
ii 
n 
1-11 
15. 8.73 
■698 
1485 
21-1 
20-5 
18-6 
1520 
21-8 
21-2 
19-3 
n 
ii 
1-21 
19. 9.73 
732 
1458 
18-5 
17-9 
17-0 
1495 
19-2 
18-6 
17-7 
„ 
// 
1-44 
17. 10. 73 
746 
1476 
17-5 
17-9 
17-0 
1513 
18-2 
18-6 
17-7 
n 
„ 
1-41 
14.11. 73 
769 
1452 
16-6 
16-3 
15-4 
1490 
17-3 
17-0 
16-1 
n 
// 
1-34 
15. 12. 73 
788 
1470 
17-8 
17-2 
15-9 
1509 
18-6 
18-0 
16-7 
„ 
n 
1-18 
12. 1.74 
801 
1483 
18-1 
17-9 
16-3 
1523 
18-9 
18-7 
17-1 
ii 
n 
1-20 
13. 2.74 
106 
1507 
181 
18-9 
18-3 
1512 
18-2 
19-0 
18-4 
n 
n 
1-15 
20. 3. 74 
847 
1426 
15-3 
14-7 
15-1 
1468 
16-1 
15-5 
15-9 
n 
// 
1-0 
20. 4.74 
875 
1456 
18-0 
17-1 
17-0 
1500 
18-8 
17-9 
17-8 
ii 
// 
1-0 
21. 5. 74 
144 
1495 
20-3 
19-5 
19-3 
1502 
20-4 
19-6 
19-4 
ii 
n 
1-15 
1. 7.74 
176 
1508 
20-8 
20-2 
18-1 
1516 
21-0 
20-4 
18-3 
ii 
„ 
1-0 
17. 7. 74 
188 
1570 
20-3 
20-5 
16-9 
1519 
20-5 
20-7 
17-1 
n 
ii 
1*1 
17. 8. 74 
206 
1517 
20-6 
20-3 
19-4 
1527 
20-8 
20-5 
19-6 
ii 
n 
1-18 
16. 9.74 
244 
1513 
20-5 
20-2 
19-1 
1525 
20-7 
20-4 
19-3 
ii 
ii 
1-28 
23. 10. 74 
297 
1497 
18-4 
20-2 
18-3 
1511 
18-7 
20-5 
18-6 
n 
ii 
1-0 
19. 11. 74 
309 
1481 
19*3 
19-3 
18-5 
1496 
19*6 
19-6 
18-8 
<! 
" 
1-15 
7. 12. 74 
321 
1479 
18-6 
18-9 
17*1 
1495 
18-9 
19*2 
17-4 
It will be observed in the additional columns for velocities and pressures* 
