The refusal of a court of equity to decree the performance of a contract relating to personalty is not based on any intrinsic. difference between land and chattels. Any distinction between them is entirely subordinate to the question whether an adequate remedy can be afforded at law. Yet constant repetition has imparted such a degree of rigidity to the rule that courts have been prone to forget the reason on which it rests. Nowhere is this fact more evident than in the field of installment contracts.