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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 4304289 | Apparatus for controlling the moisture content of foundry sand A sand moisture control system for a sand casting foundry system incorporates non contact sensing techniques for controlling the moisture content of foundry sand by the addition of water at the muller or mixing operation of a sand casting system. The temp... | 12/08/1981 |
