There is a presumption in the absence of agreement shown and notice thereof brought home to those concerned that each partner is the agent of the partnership as to all contracts and transactions within the scope of the parntership business as tested by the nature of the particular business and its ordinary usages.1

Evidence of the common and usual manner of the dealing of persons engaged in the same business and in the same locality is competent.2

The law of the place where the partnership was formed and had its place of business governs, though the transaction occurred outside of the State.3

And the course pursued by the firm may be indicative of the powers of its members.4