Whether it’s light as a feather or soft as a breeze, a precision scale can measure it. This video provides you with visible proof. You can see the effect of combustion products leaving a candle. Or watch a feather drop onto the weighing pan: the scale springs into action—settling on a value of 0.018 grams. By the time the video introduces a handheld fan into the picture and measures the force of the breeze (about 6 grams, by the way), you’ll be convinced. Precision scales are this easy to use, AND this accurate.

• 

•