  We produce explicit geometric representatives of nontrivial homology classes
in the space of long knots in R^d, when d is even. We generalize results of
Cattaneo, Cotta-Ramusino and Longoni to define cycles which live off of the
vanishing line of a homology spectral sequence due to Sinha. We use
configuration space integrals to show our classes pair nontrivially with
cohomology classes due to Longoni.
