FALSE BALANCES. 



To detect false balances, scales, &c. 



RULE. After weighing the article transpose the weight 

 and the article weighed, and if the latter is too light the 

 weight will preponderate; if too heavy the article will 

 preponderate. 



To find the true weight. 



RULE. After transposing them as above, find the addi- 

 tional weight that will produce an equilibrium : weigh it 

 with the article by the same balances: multiply the two 

 false weights thus found, together, and the square root of 

 the product will be the true weight. 



EXAMPLE. An article weighs 7 Ibs. by a false balance : 

 transposed it is found too light, and requires an additional 

 weight to produce a counterpoise: this additional weight 

 is found by the same balances to have a false weight o 

 Ibs. What is the true weight of the article? 



