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They were first presumed to be drills or punches , but when modern experiments showed that they could be made by whittling antler , bone , and even wood , they came to be regarded as worn-out scrapers . And when the time came for us , in 1998 , to replace the roof which Sir Thomas had placed above his Library around 1600 , we could think of no more fitting way to mark the replacement of that worn-out roof than to commission the British Royal Mint to use some of the ancient roof-metal to produce a limited edition facsimile of the original Bodley Medal . First , many supply-side projects are undertaken for other reasons than reducing energy consumption , such as replacing worn-out equipment . You 'll be susceptible to ailments such as worn-out hinges , broken keys , busted screens , and mangled optical drives . The loonie was created to replace the one-dollar bill , which was to be removed from circulation through attrition ; worn-out dollar bills would continue to be destroyed , but no new stock of paper currency would take their place . And after a winterlong impasse in which dancers were out of work and the company lost nearly $ 1.5 million , the conflict ended in March with a first-ever union contract — and emotions as frayed as worn-out pointe shoes . Making matters worse , you gave her your version of the same worn-out answer that she 's heard in almost every interview she 's ever conducted . You guess that worn-out batteries are the reason your flashlight is n't working now , so you get some new batteries from the drawer next to your bed and replace the ones in your flashlight . And they're the same worn-out discredited excuses that civil rights opponents have always used to try to stop progress . Nanayakkara responded with the same worn-out line : back the UPFA over the UNP as the lesser evil . Working long hours , the Columbus , Ohio-based soldiers did everything from rebuilding truck engines to replacing worn-out brake shoes on Humvees . People can anticipate some of their needs such as gifts , next season 's clothing , and replacing worn-out appliances . In some pious Muslim circles it is held that worn-out or damaged copies of the Koran must be removed from circulation ; hence the idea of a grave , which both preserves the sanctity of the texts being laid to rest and ensures that only complete and unblemished editions of the scripture will be read . The adult stem cells have the potential to regenerate with two core functions - to maintain the cell population by replacing worn-out cells and to repair tissues or organs . But the truth of the matter is that this practically new Republican Party is very much like the used cars which many of you have inspected after they , too , were advertised as practically new - they had a little more shine , a little more polish , and maybe some new accessories - but underneath were the same worn-out , inadequate works . The Commission allows utilities to recoup this depreciation expense associated with replacing worn-out equipment . This was just one of a chain of disasters in which thousands of animals were left to suffocate , burn or drown as worn-out vessels failed to complete the three to six-week journey with their cargoes of misery . The current " global war on terrorism " appears to be revisiting the same worn-out path , replacing anti-communism with a clash of civilizations in the name of battling Islamic extremism . Key elements in the housing problem were identified by Brett ( 1986 ) as an urgent need to upgrade and modernise housing stock ; to tackle deterioration in stock and to ensure that worn-out terrace housing , primitive rural cottages and inner-city block flats are replaced .