ILLUSTRATIONS
Reading edition
FIG. PAGE
BACTERIA NODULES ON THE ROOT OF LUPIN Frontispiece
1. DIAGRAM 7
2. PLAN OF SULPHURIC ACID WORKS 13
3. GENERAL VIEW OF SULPHURIC ACID WORKS 15
4. SULPHUR TRIOXIDE—THE CONTACT PROCESS 19
5. PREPARATION OF NITRIC ACID 30
6. NITROGEN CYCLE (DIAGRAM) 38
7. NITRIC ACID FROM AIR (DIAGRAM) 41
8. PREPARATION OF HYDROCHLORIC ACID 45
9. BORIC ACID 59
10. QUICK VINEGAR PROCESS 71
11. DUTCH PROCESS FOR WHITE LEAD 74
12. SALT CAKE FURNACE 83
13. BLACK ASH FURNACE 85
14. THE SOLVAY PROCESS 89
15. THE ELECTROLYSIS OF SALT SOLUTION 102
16. THE CASTNER PROCESS 105
1