Harps and Angles (2003)

Widow's walk (1996)

Ohio Gauntlet (1990)

Agronome (1990)

Up in Smoke (1988)

Hadrian and the Table of Changes (1988)

Sine Wave (1987)

Sighting wheel 2 (1986)

Sighting wheel (1985)

Buttress Series / Steps and Ladders (1976-1978)