The Laboratory in Blue Prince is home to two puzzles: the periodic table puzzle and the machine puzzle.
Both puzzles are intertwined with one another — you’ll need to solve the periodic table puzzle in order to adjust the electricity on the machine.
Below, in this Blue Prince guide, we’ll tell you how to solve both Laboratory puzzles, including how to get the period table code and how to power up the Laboratory machine.
How to solve the periodic table puzzle in the Laboratory
There are two things you’re looking for in the Laboratory to solve the first puzzle and get a hint for the second: the code (a blank periodic table with numbers) and a copy of the periodic table.
The code is on the bulletin board next to the machine with all the levers in one corner (first image above). The periodic table is in the opposite corner above a bench with a microscope (second image).
Once you have both, you can start to piece together the answer. Take the numbers in order from the code sheet and match them to the atomic symbols (one- or two-letter abbreviations) on the filled-in periodic table.
Do that, and you’ll get a sentence (after adding some spaces): PUSH THREE UP AFTER NINE.
How to power the machine in the Laboratory
Before adjusting the electricity levels on the machine, you need to turn it on first.
To power the machine found in the Laboratory in Blue Prince, you’ll need to connect a powered Boiler Room to the Laboratory. This can be done by connecting a Boiler Room directly to the Laboratory or through the ducts that can be found on the ceiling. These ducts will carry steam to each room that its connected to — as long as the room has ducts. A few examples of rooms with ducts include the Security Room, Passageway, and Archives.
Once the Laboratory has been powered by the Boiler Room, you can now use the solution from the periodic table puzzle on the machine.
First, pull lever #9 and then pull lever #3 to power and unlock the Blackbridge Grotto, a permanent addition that allows you to access one offline terminal from the network each day.
For more Blue Prince guides, here’s our full walkthrough on how to reach Room 46, plus how to unlock another permanent room with the Orchard, open the West Gate through the Garage, or how to solve the dart puzzle in the Billiards Room.
Source：https://www.polygon.com/blue-prince-guides/556540/laboratory-periodic-table-puzzle-how-to-solve-turn-on-machine
