Slag

-This has in Enrope beeo aoutly fouud to be of great raluo, having been moulded iuto many uacful aud beautiful articles. It lias been cast into (labs for pavements and paving purposcg geuernlly, intó garden rollers, tid pota nud pillara ; and it is suid in ome forma to represent artificial porphyry. If a slower procesa of cooliog wore adopted in tbia country, slag oouM be made lefa brittle, aud conae(i)eiitljr more valuable. Of course, in drtvring it off, it can be moulded into any fonn deaired - iotoblocki for build Dg, iuto mantels and otlier furmi ol oriiHineiital arohiteoturo.