Law of Reciprocal Proportions – Two distinct elements combine separately with a set mass of a third element. Law of reciprocal proportion is also called law of equivalent proportion.
Law of reciprocal proportions is that weights of two or more elements (say B and C) which combine separately with a fixed weight of a third element (say D) are Either the same as or are simple multiples of the weight of these different elements when B and C combine amongst themselves.
What is Law of reciprocal proportions and the law of equivalent proportions or the law of combining weight (Richter)?