LIST OF THE PLATES
| PLATE V. | Water-Spouts | facing page 16 |
| PLATE VI. | Maritime Observations | 163 |
| PLATE VII. | A Chart of the Gulph Stream | 197 |
| PLATE VIII. | Pensylvania Fire-Place | 235 |
| PLATE VIII*. | Profile of the Pensylvania Chimnie | 238 |
| PLATE IX. | Remedies for Smoky Chimnies | 269 |
| PLATE X. | Stove for Burning Pit-Coal | 297 |
| PLATE XI. | A Magic Square of Squares | 327 |
| PLATE XII. | A Magic Circle of Circles | 328 |
