By W. H. SAMELIUS
Never put in a mainspring without examining carefully whether any teeth or pinion leaves are broken or bent in the. main, center or third wheel. In so doing you will save yourself the trouble of taking the watch down a second time to repair damage done by the recoil of the breaking spring.
Never pour oil from the bottle into the oil cup; it is wasteful, more being lost by drip than is used, besides the danger of taking up the fine dust adhering to the flange of the bottle. The neat, handy economical way is to dip your oil wire to the bottom of the bottle and it will take away two or more drops if raised quickly. Let this fall into the oilcup until you have taken sufficient quantity.