Chapter 119: Getting Near
A day later.
Ernest had spent nearly an hour examining every failed glass bulb they had produced over the past week, arranging them across one of the laboratory tables according to how they had failed.
Some had cracked around the neck during cooling.
Others had developed hairline fractures along the body of the bulb. A few looked perfectly intact until placed under even the slightest pressure, where they collapsed almost immediately beneath his fingers.
None of them had survived the one thing an incandescent lamp demanded.
Vacuum.
Ernest stood quietly before the table, arms folded across his chest.
There was a curious habit among inexperienced engineers to celebrate successful parts while ignoring failed ones.
He preferred the opposite.
Failures explained themselves far more honestly.
Every broken bulb represented a lesson someone had already paid for.
Usually him.
A knock sounded against the laboratory door before Hollen stepped inside carrying two cups of coffee.
He stopped almost immediately.
The entire workbench was covered in shattered glass.
"..Should I be worried?"
Ernest accepted one of the cups before shaking his head.
"Not particularly."
"You say that every time."
"And so far I’ve been correct."
Hollen looked around the room.
"I count at least thirty broken bulbs."
"Thirty-two."
"You counted them?"
"I broke most of them."
The older man sighed.
"I walked in hoping to hear that progress was going well."
"It is."
He frowned.
"This is progress?"
Ernest picked up one of the cracked bulbs and held it toward the window where the morning sunlight revealed dozens of tiny fractures spreading across the glass.
"This failed because the glass cooled unevenly."
He picked up another.
"This one failed because the wall thickness varied too much."
Another.
"The seal around the copper wire leaked."
Another.
"The neck collapsed."
Hollen watched him move from bulb to bulb before finally understanding.
"So every failure tells you something."
"Exactly."
The forge owner nodded slowly.
"I still think normal people would call this a bad morning."
"Normal people don’t invent things."
That earned a reluctant smile.
"I suppose they don’t."
Ernest carefully placed the final bulb back onto the table before walking toward another workbench where one of the bamboo filaments rested beneath a sheet of clean cloth.
Compared to the glass workshop, the carbonization experiments had progressed remarkably well.
The bamboo remained consistent.
Strong enough to handle carefully.
Flexible enough to mount between supports.
The problem was no longer the filament.
It was preserving it.
He lifted the cloth and studied the thin black strand.
Without oxygen, it would glow.
With oxygen...It would vanish within seconds.
Which brought him back to the same obstacle.
Vacuum.
He reached for his notebook and turned to another page filled with sketches.
Every drawing showed the same machine.
A vacuum pump.
Or rather...
Several different vacuum pumps.
Some relied on pistons.
Others used mercury columns.
One design employed leather seals surrounding a brass cylinder.
Each possessed advantages.
Each possessed flaws.
None satisfied him completely.
Hollen leaned over his shoulder.
"So this machine removes air?"
"Yes."
"That’s still a strange sentence."
Ernest smiled faintly.
"It probably sounded equally strange the first time someone claimed they could pump water uphill."
"I suppose that’s true."
He tapped one of the drawings.
"How does this one work?"
Ernest turned the notebook toward him.
"A piston moves upward."
He traced the cylinder with his finger.
"The pressure inside drops."
Another movement.
"Outside air rushes in through a valve."
Another.
"The piston moves downward."
Another.
"The first valve closes. Then the second opens, and the trapped air leaves."
Hollen stared at the drawing for several moments.
"So every movement removes a little more air."
"Exactly."
"And eventually..."
"There isn’t much air left."
The older man rubbed his chin thoughtfully.
"I actually understood that."
"It isn’t complicated."
"No."
He looked toward the pile of sketches covering the desk.
"But building it probably is."
That answer came almost immediately.
"Very."
Precision mattered far more here than in steam engines.
A steam engine tolerated minor leaks.
A vacuum pump did not.
Every tiny imperfection allowed air to return.
Every microscopic gap became an enemy.
Ernest picked up a brass cylinder that had arrived from the machine shop the previous afternoon.
Beautiful workmanship.
Perfectly round by the standards of Belfast.
Still nowhere near good enough.
He ran a finger along the interior surface.
Too rough.
The piston would leak.
"We’ll need better boring machines," he murmured.
Hollen looked up.
"More machines."
"You’ve somehow managed to justify buying equipment while trying to build equipment."
"It saves money eventually."
"That’s exactly what you said about the steam engine."
"I was right."
"You were."
There was no arguing against history.
A few hours later Ernest walked across the factory grounds toward the precision workshop.
The machinists looked up the moment he entered.
Several immediately stopped working.
Not because they were idle.
Because experience had taught them that whenever Ernest arrived carrying notebooks, someone’s workload was about to increase.
Master Edwin, the senior machinist, wiped metal shavings from his hands before approaching.
"Good morning, Master Ernest."
"Morning."
"What brings you here today?"
"I need cylinders."
Edwin smiled.
"We’ve made quite a few of those lately."
"I need better ones."
That smile disappeared.
"How much better?"
Ernest placed the brass sample onto the inspection bench.
"This interior surface."
Edwin examined it carefully.
"It already took us two days."
"It isn’t smooth enough."
The machinist looked surprised.
"For what purpose?"
"A vacuum pump."
Edwin frowned.
"The steam engines don’t require this level of finish."
"I know."
"What does?"
"The next invention."
That answer somehow made perfect sense.
It also guaranteed nobody would be going home early.
Edwin called several machinists over.
Within minutes the workshop had transformed into an impromptu engineering meeting.
Measurements were discussed.
Tool wear.
Boring techniques.
Polishing compounds.
New cutting methods.
Even Ernest found himself impressed by how quickly experienced craftsmen adapted once they understood the goal.
Nobody complained. Instead they began solving problems.
That was precisely why he enjoyed working with skilled people.
They viewed difficult work as an invitation rather than a burden.
By late afternoon another cylinder sat upon the inspection table. Ernest held it toward the light. It was noticeably better.
Edwin watched nervously.
"Will it work?"
Ernest considered the question carefully before answering.
"I don’t know."
The workshop fell quiet.
Then Ernest smiled.
"But it’s the best one we’ve made."
That restored several smiles immediately.
Engineering rarely rewarded certainty.
Progress came one improvement at a time.
One smoother surface.
One tighter seal.
One better measurement.
Outside, the sun had begun sinking toward the western hills.
The long shadows stretching across Helmarte Machine Works painted the workshops in deep gold while steam drifted lazily above the rooftops.
Construction at Beryl continued.
The hydroelectric station slowly rose from the earth.
Inside the laboratories, glassmakers continued blowing bulb after bulb despite frequent failures.
The carbonization furnace remained active.
Machinists polished cylinders to tolerances nobody had previously considered necessary.
Every department moved independently.
Yet somehow all of them advanced toward the same destination.
Electric light.
It’s getting near.
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