An anuminium track, 1720x150 mm wide with levelling screws.
Aluminium pulley 50mm dia, clamp for vibrator and automatic
pen release. Aluminium trolley 690x80x65mm, with three wheels
mounted on ball bearings, five holes to accommodate cylindrical
masses each approximately 350 gms. Vibrator 600mm long with
clamping marks at 5 and 8 Hz and pen holder with one each
wood block 150 x 75 x 13 mm, 150 x 75 x 23 mm and 150 x 75
x 50 mm. Without pen and paper.