Pictures often come with hangers. The most common types are saw-toothed, wire and D-rings. The saw-toothed hanger is the most typical. Usually attached to the upper middle portion of the picture frame ...

IN reference to Mr. Marston's letter upon the above subject (NATURE, May 19, p. 362), I have for many years past used and advocated the use of plain copper wire in preference to any other means of ...