Balance-scale puzzles abound in recreational mathematics. The essential element is the humble two-pan balance scale — a staple of commerce over the millennia that’s still found in bustling rural ...

The Micrometer Balance Scale Co., a firm in Troy, N.Y. of which Charles Mattice was a founding director, introduced this form in 1897. The Dodge Mfg. Co., of Yonkers, ... Object Name Balance Object ...

You can use balance scales to compare the mass of objects. Look at these scales. What do you think they are showing you? "The shoe is heavier than the pencil." Or you could also say: ...