PORTABLE T O Y BALANCE SCALE Made in India (1990) ******************************************************************** The Limited Metric Weight Set is ( 50 + 20 + 10 + 5 + 2 + 1 ) Gram Here it measures the weights of a set of P L A T O N I C SOLIDS: Cube + Tetrahedron + Octahedron + Icosahedron + Dodecahedron To balance the DODECAHEDRON ( = X ) on scale, there has to be ... ( 20 + 10 ) Gram = LEFT <===> RIGHT = X + 1 Gram Therefore X = 29 Gram is the weight of the aluminum DODECAHEDRON =========== and can n o t placed with this weight set on its opposite side ! See a REAL WEIGHT SET ... R E M A R K S : -------------------------------------------------------------------- This nice brass balance scale is a R E P L I C A of a California 1849 Gold Rush Scale and can be found in Flea Markets beside other "antiques" made in modern India like Compasses or Sextants. It came with additional "Milligram" weights in a box - but USELESS, because (a) 20 % ERRORS ( Proof with the METTLER SCALE ) (b) NOT APPLICABLE with this type of scale! THEREFORE ... This is a TOY SCALE, a good teaching tool for learning arithmetics! HOW MECHANICAL SCALES WORK ... impressum: ******************************************************************** © C.HAMANN http://public.beuth-hochschule.de/~hamann 12/11/10 |