Chapter 120: The Prototypes
A week passed inside the laboratory.
At some point, Ernest stopped counting days properly and started counting prototypes instead.
Prototype thirty-six failed because the glass seal around the copper leads cracked before the pump even reached a decent vacuum. Prototype thirty-seven survived the pumping process but burned out the filament in less than two seconds. Prototype thirty-eight produced a faint orange glow that made three laboratory assistants gasp before it died so quickly that Ernest nearly questioned whether he had imagined it.
He had not.
The burnt filament proved it. Annoying progress, but progress nonetheless.
By the fourth day, the laboratory looked like a battlefield fought between glassmakers, machinists, and bamboo. Broken bulbs filled one tray. Failed filaments occupied another. Several notebooks sat open across the main workbench, each filled with observations written in Ernest’s increasingly tired handwriting. The new vacuum pump stood in the corner like an ugly brass animal, its polished cylinder connected to a leather-sealed piston assembly that required two men to operate steadily.
It was not beautiful. It was also not quiet.
Every time the piston moved, the pump made a deep wheezing sound as air was pulled from the glass bulb through a narrow metal tube. The valves clicked. The leather seals groaned. The assistants operating it sweated through their shirts while Ernest watched the mercury gauge with the focused patience of a man trying to convince nature to cooperate.
"Keep the stroke steady," he said.
One of the assistants nodded, breathing heavily. "Yes, Master Ernest."
The gauge shifted slightly.
Not enough.
"Again."
The pump moved.
Air left the bulb.
Slowly.
Too slowly.
Still, it was leaving.
That alone was better than last week.
The first major breakthrough did not come from the glass workshop. It came from the copper leads.
For days, the bulbs had failed around the point where the copper wire entered the glass. The glass cooled at one rate. The copper expanded and contracted at another. The result was always the same. Tiny cracks formed near the seal, too small to see at first, but large enough for air to creep inside and ruin the vacuum.
Ernest solved it by changing the shape of the contact.
Instead of pushing a thick copper wire directly through the glass, he ordered the machinists to flatten the end into a thin ribbon before sealing it in place. More surface area. Less stress concentration. Better bonding with softened glass.
The difference was immediate.
Prototype forty-two held vacuum for nearly an hour.
Prototype forty-three held overnight.
That morning, Ernest walked into the laboratory, checked the gauge, and simply stood there for several seconds.
One assistant looked nervous. "Master Ernest?"
"It held."
The room went quiet.
"It held?" another asked.
Ernest nodded. "It held."
Nobody cheered. Not yet.
They had learned better.
Success in this laboratory had a habit of humiliating anyone who celebrated too early.
The second breakthrough came from the bamboo.
The carbonized filaments were too inconsistent. Some snapped while being mounted. Others survived mounting but broke when current passed through them. The problem was not simply the carbonization process. It was the original shape of the bamboo fiber.
Ernest eventually stopped cutting straight strips and began shaving extremely thin curved fibers from the inner wall of the bamboo before bending them into small loops.
The loop mattered.
A straight filament sagged too easily once heated. A loop distributed stress more evenly and allowed both ends to connect to the copper supports without excessive tension.
Prototype forty-eight glowed for eight seconds.
Prototype forty-nine reached twenty-one.
Prototype fifty-two lasted nearly two minutes before the filament broke at one end.
Two minutes.
That was enough to make the entire laboratory stop breathing.
A tiny orange light had filled the glass bulb.
Light from electricity.
It had been weak, warm, and slightly uneven, but it had existed.
For two minutes, the room had seen something that no one in Belfast had ever seen before.
After the bulb failed, no one spoke for a while.
Finally, one of the glassmakers whispered, "It looked like a star trapped in a bottle."
Ernest stared at the blackened remains of the filament.
"Not yet."
The man blinked. "Master Ernest?"
"It is not a star yet."
He picked up his pen and wrote the failure notes.
Filament broke at upper support. Likely uneven tension during mounting. Reduce clamping pressure. Improve carbonization uniformity. Test slower current increase.
The assistants exchanged glances.
Then returned to work.
By the sixth day, everyone inside the laboratory had changed.
Several had dark circles beneath their eyes. One glassmaker had started muttering insults at bubbles trapped inside glass. The machinists working on the vacuum pump had begun treating the leather seals like sacred objects, rubbing them with oil and checking them every few hours. Even the assistants no longer asked whether a failure meant the idea was impossible.
They simply asked what failed.
That was good.
That meant they were becoming engineers.
Late in the afternoon, Prototype fifty-seven glowed for eleven minutes.
The laboratory did not cheer, they simply watched quietly and suspiciously.
As if the bulb might die out of spite if anyone looked too happy.
The filament glowed orange, then yellow-orange as the current stabilized. The glass remained intact. The copper seals held. The vacuum did not collapse. The light shone across the workbench and painted the scattered tools in a warm glow unlike candlelight.
It did not flicker.
That was what struck Ernest most.
Candles flickered.
Oil lamps trembled whenever air moved.
Fire was alive and therefore unreliable.
This light was steady.
Produced by current flowing through carbon inside a glass bulb emptied of air.
It lasted eleven minutes and thirty-four seconds.
When it failed, the filament did not explode. It simply thinned, brightened for half a breath, and snapped.
The room exhaled at once.
Hollen, who had arrived halfway through the test, stared at the dead bulb with his mouth slightly open.
"That was not fire."
"No."
"It looked like fire."
"It was heat."
The older man slowly sat down.
"I dislike that I understood that."
Ernest smiled faintly.
"Good. That means the explanation is improving."
Hollen looked at him. "Can it be made brighter?"
"Yes."
"Can it last longer?"
"Yes."
"Can it light a room?"
Ernest turned toward the dead bulb, then toward the notes scattered across the table.
"Eventually."
The older man rubbed his face with both hands.
"I came here to ask about timber contracts."
"Those can wait."
"I see that now."
Prototype fifty-eight failed immediately because one of the copper supports shifted during sealing.
Prototype fifty-nine cracked during pumping.
Prototype sixty glowed for four minutes.
Prototype sixty-one lasted eighteen.
By then, the laboratory workers had stopped pretending they were not excited.
They moved with exhausted urgency, preparing more bamboo loops, checking seals, cleaning glass, and operating the pump with the care of priests handling relics. Outside, evening slowly settled over Oriel Estate. Servants lit lamps in the hallways. The world continued relying on flame while inside the laboratory, Ernest tried to end that dependence one fragile glass bulb at a time.
The successful prototype came just after nightfall.
Prototype sixty-four.
It did not look special.
The bulb was slightly uneven, thicker on one side than the other. The bamboo filament formed a narrow loop between two copper supports. The seal around the neck looked better than most, though still not as clean as Ernest wanted. The vacuum gauge held steady after pumping, which was promising but not enough to make him confident.
Nothing about invention was ever generous enough to announce success beforehand.
Ernest connected the leads to the battery assembly.
One assistant stood beside the switch.
Another watched the gauge.
The glassmaker hovered near the table with the expression of a man afraid to breathe too hard.
Hollen had returned, though Ernest had no idea when. The older man stood near the door with his arms folded, watching without interrupting.
Ernest nodded.
"Slowly."
The assistant adjusted the resistance coil first.
A small current entered the filament.
Nothing happened.
More current.
The filament darkened slightly.
More.
A dull red glow appeared inside the bulb.
Everyone stopped moving.
"Continue," Ernest said quietly.
The assistant turned the contact another fraction.
The red became orange.
Then brighter.
Then warmer.
The bulb glowed.
Not as brightly as a modern lamp.
Not even close.
But it glowed steadily enough to cast shadows behind the tools on the workbench.
Nobody spoke.
The laboratory seemed to shrink around that single point of light.
Minutes passed.
Five.
Ten.
Fifteen.
The filament remained intact.
Twenty.
The vacuum held.
Thirty.
The glass remained clear.
Forty.
The light continued.
Ernest did not smile at first.
He simply watched.
Because this was not perfection.
Far from it.
The lamp was inefficient. The filament would not last long. The vacuum pump was slow. The bulb production process was inconsistent. The battery supply was wasteful, and the hydroelectric station was still unfinished.
But none of that mattered.
Tonight, electricity had produced usable light.
That was enough.
At forty-seven minutes, Ernest finally straightened.
"Send for Master Hollen."
The assistant blinked and looked toward the door.
"He is already here, sir."
Ernest turned.
Hollen stood there, silent, his face lit by the strange glow coming from the workbench.
For once, the older man had no joke ready.
That alone told Ernest everything.
He walked toward the door and gently closed it, shutting out the candlelight from the hallway. The laboratory dimmed immediately, leaving only the soft electric glow shining from the glass bulb on the table.
Hollen stared at it.
The light did not flicker.
It did not smoke.
It did not consume oil.
It did not bend beneath drafts.
It simply glowed.
After a long while, Hollen swallowed.
"Gods."
Ernest stood beside him, equally quiet.
The bulb hummed faintly through the wires.
A fragile loop of carbonized bamboo burned with captured electricity in a glass shell emptied of air.
Outside, Oriel Estate remained lit by candles and oil lamps.
Inside the laboratory, for the first time in the history of the Kingdom of Belfast, a room was illuminated by electric light.
Hollen finally looked at Ernest.
"You did it."
Ernest looked at the bulb.
Then at the shadows it cast against the walls.
Then back again.
"No," he said softly. "We proved it can be done."
The distinction mattered. A lot.
Hollen stared at him for several seconds.
Then he gave a tired laugh.
"Only you would look at the first light in the world and immediately think about improvements."
Ernest smiled at last.
"Of course."
"So, how much money can we make out from it?"
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