Section 46. Delivery to a Carrier on Behalf of the Buyer.—

  1. Where, in pursuance of a contract to sell or a sale, the seller is authorized or required to send the goods to the buyer, delivery of the goods to a carrier, whether named by the buyer or not, for the purpose of transmission to the buyer is deemed to be a delivery of the goods to the buyer, except in the cases provided for in section 19, Rule 5, or unless a contrary intent appears.

  2. Unless otherwise authorized by the buyer, the seller must make such contract with the carrier on behalf of the buyer as may be reasonable, having regard to the nature of the goods and the other circumstances of the case. If the teller omit so to do, arid the goods are lost or damaged in course of transit, the buyer may decline to treat the delivery to the carrier as a delivery to himself, or may hold the seller responsible in damages.

  3. Unless otherwise agreed, where goods are sent by the seller to the buyer under circumstances in which the seller knows or ought to know that it is usual to insure, the seller must give such notice to the buyer as may enable him to insure them during their transit, and, if .the seller fails to do so, the goods shall be deemed to be at his risk during such transit.