A review of recent progress in the mining industries of the United States
โ Scribed by F.Lynwood Garrison
- Publisher
- Elsevier Science
- Year
- 1902
- Tongue
- English
- Weight
- 360 KB
- Volume
- 153
- Category
- Article
- ISSN
- 0016-0032
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
WHILE it is quite true that the twentieth century has brought with it a host of inventions as well as actual improvements in the way of ch~nical preparations, unique processes, and laborsaving machinery, we must agree that by far the most important part of the program has been the amplification and
tates a return current of more than IOOO amperes; yet not the slightest indication of any such current has so far been found, and no satisfactory explanation for its absence has been given." Much mo.re, of course, might be said on this subject, for it is a big one on which many have labored, but pe