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Updated: June 25, 2025
He was, in fact, quite rigid with fright and horror. It were idle to argue that only unlikely chance would wing one of the bullets from the Valkyr to a vital point: there was the torn canvas overhead, there was that hole through Vauquelin's sleeve.... And then the barograph on the strut beside Lanyard disappeared as if by magic.
It was a quarter past ten o'clock, and the barograph needle pointed to twelve thousand eight hundred. Up I went and up, my ears concentrated upon the deep purring of my motor, my eyes busy always with the watch, the revolution indicator, the petrol lever, and the oil pump. No wonder aviators are said to be a fearless race. With so many things to think of there is no time to trouble about oneself.
You can see how it acts automatically to steady the machine, no matter how we move about. And I am almost as safe up in a squally wind as on a calm day." He took Hugh much higher than he had the others, as the barograph that was within seeing distance from their seat told the boy, who had learned how to read its figures.
But novel as all these sensations would be to an aërial novice, they were an old story to the boys. Jack devoted his attention to testing a new steering appliance he had equipped the craft with, and Tom watched his engines with an eagle eye to detect a skip or a "knock." "How high now?" asked the young engineer after an interval. Jack glanced at the barograph on the dashboard in front of him.
I had a great surprise when I looked at the barograph this morning as the needle had gone right off the paper at the bottom, and at first glance I thought we had struck a tropical depression of the first magnitude, which, flouting all the laws of meteorology, had somehow found its way to the English Channel; but the engineer explained to me that, as I have already stated, the low atmospheric pressure in the boat was due to the conning-tower hatch being shut down.
And even as any one of these bullets might have proved fatal, their first successor might disable the aviator if it did not slay him outright; in either case, the inevitable result would be death following a fall from a height, as recorded on the barograph dial an instant before its destruction, of more than four thousand feet. They were still climbing....
"And if it hadn't been for your money, I couldn't have done anything," declared the aviator. "It all worked together." "Say, how high are you going to take us?" asked Innis. "Not getting scared, are you?" asked Dick, with a glance at the barograph, to ascertain the height above the earth. "We're only up about two thousand feet. I want to make it three." He looked at Mr. Vardon for confirmation.
Finally Tom, after a glance at the barograph, roared at Prescott: "Five thousand feet up on a dark night, and we're going to fifteen thousand feet. All we now have to fear will be other German aircraft, but there'll be fleets of them sent out to look for us!" Prescott nodded, though he could not hear in the roar of the motors and the rush of the air past him.
A meteorological screen or box was erected on a platform over the stern, right away from the living quarters, and in it were placed the maximum and minimum thermometers, the recording barograph, and thermograph an instrument which writes every variation of the temperature and pressure on a sheet of paper on a revolving drum and the standard thermometer, a very carefully manufactured thermometer, with all its errors determined and tabulated.
I cannot doubt that at the edge of the earth's envelope the risk would be a very real one. "My barograph needle marked forty-one thousand three hundred when I became aware that I could go no farther. Physically, the strain was not as yet greater than I could bear, but my machine had reached its limit.
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