I look at the instrument panel again and see we are close to being seven thousand miles down, and all at once the gauges
show we are out of energy.
The installation of a draft gauge or gauges
is strongly to be recommended and a record of such drafts should be kept as being a check on the combustion rates.
Mackenzie, who had been glancing that moment at the gauges,
gazed eagerly up, and staggered back as if he had received a blow.