| A weak smell of sulphuretted hydrogen and sometimes chlorine gas is noting at Severo-Kurilsk. |
| If the white precipitate formed by water be treated with sulphuretted hydrogen it becomes orange-coloured. |
| Mix quicklime and water to a thick cream, and pass into the mixture 25 or 30 times its volume of sulphuretted hydrogen gas. |
| It is a white amorphous infusible powder, which when strongly heated in sulphuretted hydrogen, yields an oxysulphide. |
| The agitation is continued until a portion of the liquid taken out is not blackened by sulphuretted hydrogen. |
| With nitric acid it strikes a fine red colour, which is removed by sulphuretted hydrogen and sulphurous acid. |
