1. The edge or border; the edge of a body of water where it meets the land. As applied to a bouudary Hue of land, the “margin” of a river, creek, or other water-course means the center of the stream. Ex parte Jennings, 6 Cow. (N. Y.) 527, 16 Am. Dec. 447; Varick v. Smith, 9 Paige (N. Y.) 551. But in the case of a lake, bay, or natural pond, the “margin” means the line where land and water meet. Fowler v. Vree- land, 44 X. J. Eq. 268, 14 Atl. 116; Lem- beck v. Andrews. 47 Ohio St. 336, 24 N. E. 686. 8 L. R. A. 578. 2. A sum of money, or its equivalent, placed in the hands of a stockbroker by the principal or person on whose account the purchase is to be made, as a security to the former against losses to which he may be exposed by a subsequent depression in the market value of the stock. Markhara v. Jau- don. 49 Barb. (N. Y.) 468; Sheehy v. Sbinn, 103 Cal 325. 37 Pac. 393: Memphis Brokerage Ass’n v. Cullen, 11 Lea (Tenn.) 77: For- tenbury v. State, 47 Ark. 188. 1 S. W. 58.