Eight-coloured 12 mm clear and fluorescent glass tubing pumped with argon/neon/mercury gas, two parts
229.0 × 560.0 × 150.0 mm
229 x 56 x 15 cm 90 1/8 x 22 1/8 x 5 7/8 inches
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, 1964–65
Six circular glass tubing pumped with argon/neon gas, chrome-plated steel Tstands, porcelain-enamel coated steel base
508.0 × 730.0 × 730.0 mm