| (a) | - | A transfers a farm to B for his life, with a proviso that, in case B cuts down a certain wood, the transfer shall cease to have any effect. B cuts down the wood. He loses his life-interest in the farm. |
| (b) | - | A transfers a farm to B, provided that, if B shall not go to England within three years after the date of the transfer, his interest in the farm shall cease. B does not go to England within the term prescribed. His interest in the farm ceases. |