| *Knots and Splices | 175 |
| Influence of Cold on Iron and Steel. | 176 |
| Oak Graining in Oil Colors | 176 |
| Knots and Splices (Explanation) | 177 |
| Hartford Steam Boiler and Insurance Co.'s Report | 177 |
| *Improved Spiral Spring for Railway Carriages | 178 |
| *Portable Writing and Copying Case | 178 |
| How Walking-sticks are Made | 178 |
| Flowering of the Victoria Regia | 178 |
| Jute | 178 |
| Ventilation of the Liverpool Tunnel | 178 |
| *Impregnating Wood with Tar, etc. | 178 |
| *Boardman's Combined Tool | 179 |
| *Belt Tightener | 179 |
| Some Things I don't want in Building Trades | 179 |
| *Action of the Reciprocating Parts of Steam Engines | 179 |
| *Answer to Practical Problems | 179 |
| Reciprocating Parts of Steam Engines | 179 |
| Test for White Lead | 180 |
| How to Build a Chimney | 180 |
| Crystallized Honey | 180 |
| Rambles for Relics.—No. 2 | 180 |
| Silk Culture | 181 |
| *Universal Boring Machine | 182 |
| *Combined Trunk and Rocking-chair | 182 |
| Cosmetics | 182 |
| *Smith's Infant Dining-chair | 182 |
| The Medicines of the Ancients | 182 |
| *Barnes Ventilator for Mattresses | 182 |
| Exhibition of the National Photographic Association | 182 |
| A Scientific and Technical Awakening | 183 |
| The Sherman Process | 183 |
| Rubber Tires for Traction Engines | 183 |
| Central Shaft of the Hoosac Tunnel | 184 |
| A Museum of Art and Natural History | 184 |
| Report of Judges, American Institute Fair.—The Allen Engine | 184 |
| Lyceum of Natural History | 184 |
| Warming and Ventilating Railroad Cars | 184 |
| The Mineral Resources of Missouri | 185 |
| Scientific Intelligence | 185 |
| American Institute of Mining Engineers | 185 |
| Consumption of Sugar, Coffee, and Tea | 185 |
| Unpleasant Discovery in the Patent Office | 185 |
| Substitute for Albumen in Photography | 185 |
| Louisiana State Fair | 185 |
| Test for Purity of Water | 185 |
| New Books and Publications | 185 |
| Business and Personal | 186 |
| Answers to Correspondents | 186 |
| Applications for the Extension of Patents | 186 |
| Recent American and Foreign Patents | 187 |
| Queries | 187 |
| Inventions Patented in England by Americans | 187 |
| List of Patents | 187 |
