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-129expresses by words or conduct his assent to becoming the owner of those specific goods. Article C—Subject Matter of Contract § 1425. Existing and future goods (a) The goods which form the subject of a contract to sell may be either existing goods, owned or possessed by the seller, or goods to be manufactured or acquired by the seller after the making of the contract to sell, in this chapter called "future goods." (b) There may be a contract to sell goods, the acquisition of which by the seller depends upon a contingency which may or may not happen. (c) Where the parties purport to effect a present sale of future goods, the agreement operates as a contract to sell the goods. § 1426. Undivided shares (a) There may be a contract to sell or a sale of an undivided share of goods. If the parties intend to effect a present sale, the buyer, by force of the agreement, becomes an owner in common with the owner or owners of the remaining shares. (b) In the case of fungible goods, there may be a sale of an undivided share of a specific mass, though the seller purports to sell and the buyer to buy a definite number, weight or measure of the goods in the mass, and though the number, weight or measure of the goods in the mass is undetermined. By such a sale the buyer becomes owner in common of such a share of the mass as the number, weight, or measure bought bears to the number, weight, or measure of the mass. If the mass contains less than the number, weight, or measure bought, the buyer becomes the owner of the whole mass and the seller is bound to make good the deficiency from similar goods unless a contrary intent appears. § 1427. Destruction of goods sold (a) Where the parties purport to sell specific goods, and the goods without the knowledge of the seller have wholly perished at the time when the agreement is made, the agreement is void. (b) "Where the parties purport to sell specific goods, and the goods without the knowledjste of the seller have perished in part or have wholly or in a material part so deteriorated in quality as to be substantially changed in character, the buyer may at his option treat the sale: (1) as avoided; or (2) as transferring the property in all of the existing goods or in so much thereof as have not deteriorated, and as binding the buyer to pay the full agreed price if the sale was indivisible, or to pay the agreed price for the goods in which the property passes if the sale was divisible. g 1428. Destruction of goods contracted to be sold (a) Where there is a contract to sell specific goods, and subsequently, but before the risk passes to the buyer, without any fault on the part of the seller or the buyer, the goods wholly perish, the contract is thereby avoided. (b) "Where there is a contract to sell specific goods, and subsequently, but before the risk passes to the buyer, without any fault of the seller or the buyer, part of the goods perish or the whole or a material part of the goods so deteriorate in quality as to be substan-
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