In the slang of the Royal Air Force man, the cockpit of his plane is the ‘pulpit’ or ‘office’, the glass covering over it the ‘greenhouse’.

Figure 2.6 shows the diagram Charnley published of the airflow in the 'greenhouse'; it can be seen that reasonable downward unidirectional airflow was achieved close to the operating table.

The greenhouse system for providing a nearly bacteria-free operating environment consists of a 10 by 10-foot aluminum frame with plexiglass panes forming three sides and a polyvinyl curtain forming the fourth side. […] However, the greenhouse contains its own light supply, while this is an extra with the air curtain unit.

It's almost impossible to make judgements when you're being playful – as by definition it's spontaneous activity – so your baby ideas get nurtured and greenhoused better.

Greenhouse

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