Sale of Goods. [Ch. 31. No.9. 821 PART ITT. EFFECTS OF THE CONTRACT. Transfer of property as between seller and buyer. 18. Where there is a contract for the sale of unascertained goods, no property in the goods is transferred to the buyer unless and until the goods are ascertained. 19. (1) Where there is a contract for the sale of specific or ascertained goods, the property in them is transferred to the buyer at such time as the parties to the contract intend it to be transferred. (2) For the purpose of ascertaining the intention of the parties, regard should be had to the terms of the con- tract, the conduct of the parties, and the circumstances of the case. 20. Unless a different intention appears, the following are rules for ascertaining the intention of the parties as to the time at which the property in the goods is to pass to the buyer: I. Where there is an unconditional contract for the sale of specific goods in a deliverable state, the property in the goods passes to the buyer when the contract is made, and it is immaterial whether the time of payment or the time of delivery, or both, be postponed. II. Where there is a contract for the sale of specific goods and the seller is bound to do something to the goods for the purpose of putting them into a deliverable state, the property does not pass until such thing be done, and the buyer has notice thereof. III. Where there is a contract for the sale of specific goods in a deliverable state, but the seller is bound to weigh, measure, test, or do some other act or thing with reference to the goods for the purpose of ascer- taining the price, the property does not pass until such act or thing be done, and the buyer has notice thereof. IV When goods are delivered to the buyer on approval or “ on sale or return,” or other similar terms, the property therein passes to the buyer— (a) when he signifies his approval or acceptance Property in unascer- tained goods does not pass. Property in specific or ascertained goods passes when intended to pass. Rules for ascertaining intention as to time when property passes.