Percentage of lead and specific gravity. P. C.                   S. G. P. C.                  S.G.

0......... 7.290 28........ 8.105

1......... 7.316 29........ 8.137

2......... 7.342 30........ 8.169

3......... 7.369 31........ 8.202

4......... 7.396 32........ 8.235

5......... 7.423 33........ 8.268

6......... 7.450 34........ 8.302

7......... 7.477 35........ 8.336

8......... 7.505 36........ 8.379

9......... 7.533 37........ 8.405

10......... 7.562 38........ 8.440

11......... 7.590 39........ 8.476

12......... 7.619 40........ 8.512

13......... 7.648 41........ 8.548

14......... 7.677 42........ 8.584

15......... 7.706 43........ 8.621

16......... 7.735 44........ 8.658

17......... 7.764 45........ 8.695

18......... 7.794 46........ 8.732

19......... 7.824 47........ 8.770

20......... 7.854 48........ 8.808

21......... 7.885 49........ 8.846

22......... 7.916 50........ 8.884

23......... 7.947 60........ 9.299

24......... 7.978 70........ 9.736

25........8.009 80........10.225

26......... 8.041 90........10.767

27......... 8.073 100........11.370