Cylinder with rhombus
February 1917Translation
[Diagram: cylinder with inscribed rhombus, corners marked "p" and "n"] p n
Original (Swedish)
[Diagram: cylinder med inskriven romb, hörn mÀrkta "p" och "n"] p n
[Diagram: cylinder with inscribed rhombus, corners marked "p" and "n"] p n
[Diagram: cylinder med inskriven romb, hörn mÀrkta "p" och "n"] p n