contaminated pills problem

You have 4 jars of pills. Each pill is a certain weight, except for contaminated pills contained in one jar, where each pill is weight + 1. How could you tell which jar had the contaminated pills in just ONE measurement?


Take 1 pill from jar one, take 2 pills from jar two, take 3 from jar three, take 4 from jar four,
Put them on the measurement instrument.
If the overweight is 1 , jar one has contaminated pill
If the overweight is 2, jar two has contaminated pill
If the overweight is 3, jar three has contaminated pill
If the overweight is 4, jar four has contaminated pill