Chapter XII Economical Process
| Working Loss | 175 |
| Lowest Estimate Real Loss | 175 |
| Total Working Loss | 176 |
| Shop Floors | 177 |
| Waste-saving Precautions | 177, 178 |
| Treatment of Waste | 178 |
| Burning of Polishings | 179 |
| Treatment of Waste Liquids | 180 |
| Processes for the Recovery of Silver from Waste Waters | 180, 182 |
| Chloride of Silver | 183 |
| Aqua-regia | 183 |
| Precipitating Silver in Waste Waters | 183 |
| Solution for Precipitation | 184 |
| Sediment in Collecting-vessels | 185 |
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