Most patients were on ventilators, and the samples were mostly aspirates from ventilation tubes.
You're referring to those large, snaking ventilation tubes.
By 4 November, Stephenson was testing a lamp which had three narrow ventilation tubes in the base.
Overhead, fluorescent bulbs provided a noonish light and yellow ventilation tubes undulated.
Ventilation tubes coil around scaffolds, snake above sidewalks, quiver and pulse.
The key feature of Davy's so-called "safe lamp" of October 1815 was a series of narrow ventilation tubes, within which, Davy found, fire-damp would not explode.
The end of the machine was an open framework of steel beams, threaded with catwalks, conveyor belts, stepladders, and ventilation tubes.
On 30 October, Davy had communicated several designs of lamp, including his "safe lamp" with narrow ventilation tubes, to friends by private letter.
When Davy presented his improved lamp, featuring gauze rather than narrow ventilation tubes, Stephenson would not allow that the use of gauze was anything other than "a variation in construction".
From one upstairs waiting room, uncannily ordinary with its drab curtains and sensible chairs, you can look into another room where lurid flora spreads over the wallpaper and ventilation tubes twist from glass cabinets like mutant worms.
Davy had had the benefit of seeing a working example of Clanny's lamp, but his own "safe lamp" with narrow ventilation tubes was a very different machine to Clanny's.
