Section 42. All real and personal property liable to be taken on execution, except such personal property as, from its nature or situation, has been considered as exempt according to the principles of the common law as adopted and practiced in the commonwealth, or which is specifically exempt from execution under section thirty-four of chapter two hundred and thirty-five, and except as provided in the four following sections, may be attached upon a writ of attachment in any action in which the debt or damages are recoverable, and may be held as security to satisfy such judgment as the plaintiff may recover; but no attachment of land shall be made on a writ returnable before a district court unless the debt or damages demanded therein exceed twenty dollars.