In a cooling curve of a single substance there is a thermal arrest point where the liquid turns into solid. My laboratory manual mentions that in a cooling curve containing two liquids (A + B), in addition to the arrest there is a second point called a "break". It says the point at which solid A forms is called the break and the point at which solid A and B form together is the arrest. My physical chemistry textbook does not mention the break. My question is: what does the break point look like on a cooling curve? I need to be able to identify it.