The ornamental design for a lamp for producingchanging decorative effects by means of enclosed continuously flowing fluids, substantially as shown and described.
FIG. 1 is an isometric view of a lamp for producing changing decorative
effects by means of enclosed continuously flowing fluids showing my new
design;
FIG. 2 is a side elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof; and
FIG. 5 is an opposite side elevational view thereof.