A statute providing for notice where there was none before,1 or lengthening the period for which notice must be given, affects the remedy only and hence may apply to prior contracts. Thus a statute passed after a tax sale, requiring the vendee to give notice to the owner or occupant of the land at least sixty days before the end of the three year period fixed by law for redemption has been held valid.2 A period of ninety-one days for compliance with the statute was held a reasonable period of time.3 So a statute dispensing with notice does not impair the obligation of contracts.4