Rainforest Wall, 2000-2001
Rays, 1966
Red Coil Head, 1984-1985
Red Linear Light Cylinder, 1969
Red Line Drum, 1965
Red Line Koan, 2007
Red Net, 1985
Red Tower, 1969
Reflections Tableau 1, 1962
Reflections Tableau 2, 1962
Reflections Tableau 3, 1962
Reflections Tableau 4, 1962
Regal Head, 1987/1990
Revealing, 2001
Rites of Passage, 1972
Rock Cuff, 2008
Rock Rings, 2009
Ruins of Kasch, 2008
Salute to Spectra Messengers, 1969
Saturn Two Line Drum, 1965
Saurian, 1978
Seagate: The Sea in my Elbow, 1996-1998
See Thru Koan, 1969
See Thru Koan III, 1974
S/HE, 2014
Sharp Ellipse, 1969
She, 1982-1984
She Drawing Series, 1985-86
She’s so Blue, 1985
Silver Cylinder, 1965-65
Six Throws Of The Oracular Keys, 1981
She Me Skin of the Tree, 1999
Silver Ziggurat, 1969
Sketches for Lady of the Wild Things, 1982
Sky Never Stops, 1965
Sky Scrolls, 1959-61
Small Cities, 1961
Small Red Cylinder, 1964-65
Small Spring Ritual, 1970
Solar Beacon, 2012
Soft Koan, 1981
Sound Rain Free Future, 1963-1964
Space Displace Koan, 1969
Spectrum, 1966
Spinning Dolls, 2016
Split Spiral Spin: Project for a Sculpture as an Interference System, 1982
Split Spiral Spin (Proposal), 1982
Sunray, 1967
Sunstar, 2018
Stardust Ruins, 2008
Starslide (Construction), 2005
Starslide, 2005
Stone Koans, 1997
Striped Koans, 1994-1999
Studies for Heads, 1985
Studies for Woman of War, 1985
Sweet Dreams, 2002-2011
Table, 2000
Tarahumaras, 1972
Time is Change, 1966
The Dance, 2013
Three Line Koan, 2008
Three Proposals for a Milton Keynes Traffic Roundabout, 1979
Threes, 1974-1975 / 1990
Thru the Looking Glass, 1969
Tilt, 1970
Time Forces Split, 1965
Time’s Rhythm, 1999
Thisthat, 1975
Thisthat II, 1975
Three Line Koan, 2008
Three Who See, 1972
Through Another Eye, 1974
Torn Head, 1987-1990
Touchstone, 1977
Transformation of the Bride Triptych, 1987
Transparent Bishop, 1969
Triangles, 1994/1995
Tulip Mine, 2017
Vibrographe, 1962
Warrior, 1989
Waveguide, 1977-1978
Way Out Is Way In, 2009
Weapon of Time, 1999
Wedges, 1969
Whirling Wind Koan, 1970
White Koan, 1971
White Gnomon, 1969
Who Will Say, 2011
Windows, 1980
Winning Words, 2014
Woman of War, 1986
Woman of War (study for Head), 1984
Words to Walk On, 1993
Yellow Drilling, 1961
Young Universe, 1962
Zero Gravity Koan, 2004
Zig Zag Blue, 1987