| If you find yourself a partner of a similar height and build to yourself, you are effectively doubling your collective wardrobes. |
| Add salt and a little lemon juice and the albumen will trap the air as you whisk, doubling in volume. |
| An adjoining glassed-in conference room serves as a second facility, doubling as both a classroom and a lending library. |
| He applied mechanics to improve turbines and waterwheels more than doubling the efficiency of the waterwheel. |
| The Martingale system involves doubling your bet after each loss. Many players try it and have initial success. |
| The methods of tree felling were altered and piece work was introduced, doubling the woodcutters ' wages and leading to increased costs. |
