| Sometimes called Colonel Chestertons everlasting staircase, from the gallant inventor or improver. |
| Other viscosity improver additives mechanically break down during use and cause the oils to lose some of their widetemperature range properties. |
| He was the improver of that noble instrument the Orrery, which, in honour of him, was called after his name. |
| The latter afterwards became a noted builder and improver of lifeboats, and was well and deservedly rewarded for his labours. |
| That night there was blank dismay in every Avonlea house where an improver lived. |
| It is an improver, an enabler, an instrument that encourages bigger and bigger ambitions. |
