I loved the idea of something _irresistibly travelling along a set path—_marbles rolling down wooden or plastic troughs, subway trains hurtling beneath city streets, water propelled by gravity through underground pipes, rivers implacably tumbling and oozing their way to the sea.
I loved the idea of something irresistibly travelling along a set path — marbles rolling down wooden or plastic troughs, subway trains hurtling beneath city streets, water propelled by gravity through underground pipes, rivers implacably tumbling and oozing their way to the sea.
The feed mixture was transferred to separate plastic troughs (40 cm diameter × 15 cm depth) and allowed for 7 days of initial natural decomposition (Parthasarathi 2007a, b).
Fifteen grams of sexually immature, preclitellate P. excavatus (15 18 days old) (±34 36 numbers) were inoculated into each plastic troughs separately, each trough containing 1 kg of feed substrate of different proportions (initial 0-day) (Parthasarathi 2007a, b).
Dyson's solution was to design a deep molded-plastic trough and to replace the wheel with a plastic sphere.
Mass flow rate: flow meter Open image in new window Figure 1 The fiberglass-reinforced plastic parabolic trough.
One week prior to starting the experiment, a 1900-L tub (food-grade plastic water trough) was filled with well water and left outdoors.
A squadron of model helicopters lined up in front of a Christmas tree-wrapping machine, from which they emerge, propellers folded like resting insects, cocooned in plastic netting a trough of fine sand running the length of the gallery, along which the artist has skied, leaving the track of the skis, the pock-marks of the ski-poles.
The rails that form the stalls are made of wood and wooden pegs, and the water troughs are plastic, not metal.
