What is the test for establishing that a husband intended to give his wife the survivorship of her share in a joint investment?

In the absence of direct evidence as to the intent, the law deals with presumptions. It has been held that if the husband and wife each contribute to a joint investment, or to the purchase of a security, and the title is taken in their joint names to be held by them, their executors, administrators or assigns, no presumption arises from the nature of the act that either intended to make a gift of his or her share to the survivor, and they would hold the same as tenants in common. * * * On the other hand, where a husband purchases with his own funds personal property, taking the title thereto in the joint name of himself and his wife, or makes a deposit in the savings bank of his own funds in their joint names, in the absence of other evidence the presumption will be that he intended to confer upon his [236 N.Y. 453]wife the right of survivorship. * * * Where it does not appear to whom the money belonged when it was placed in the bank, or who placed it there, although the bank book may be in the joint name of husband and wife, in the absence of other evidence of intent the presumption will obtain that each had an equal interest therein. (Wetherow v. Lord, 41 App. Div. 413.)