Abstract: An eye drops composition containing estradiol-17beta dissolved therein or in a crystalline form, said composition being suitable for treating chronic catarrh disorders of the ocular conjunctiva, that is chronic conjunctivitis simplex.

Abstract: A rack for the parallel arrangement of a number of circuit boards provided with electronic components and the connecting electric wiring and a first part of a contact device has a front and a rear pair of mutually parallel profile bars attached between and perpendicular to two end plates with the second parts of the contact devices arranged between the rear pair of bars. In order to guide the first part of the contact device towards the second part when sliding the circuit boards into the rack, a guide moulding is provided for each profile bar with the moulding having transverse guide grooves and being insertable in a groove from the ends of the respective profile bar which is longitudinally fixed between the end plates when these are mounted.