Final answer:
Two out of twelve amendments proposed by James Madison for the Bill of Rights were rejected. They dealt with the apportionment of the House of Representatives and the timing of congressional salary changes. The other ten amendments were accepted, forming the Bill of Rights.
Step-by-step explanation:
James Madison originally proposed twelve amendments to the Bill of Rights, of which two were rejected. The two rejected amendments were concerning the apportionment of the House of Representatives and the congressional salaries.
The first rejected amendment aimed to set a formula for determining the number of representatives based on the population until the number of representatives reached 200, after which it proposed a set apportionment ratio.
The second rejected amendment, which eventually became the 27th Amendment, sought to delay laws affecting congressional salary changes until after the subsequent election of representatives. The remaining ten amendments were accepted and became known as the Bill of Rights.