Chapter Four: Laboratory

Hidden Expedition: Smithsonian Castle Walkthrough Chapter Four: Laboratory features detailed directions, custom marked screenshots, and simple solutions to all the puzzles you'll encounter as you follow the clues to unlocking the secrets of time travel!

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Chapter Four: Laboratory

Helen

  • Speak to Helen.
  • Select the chalk to complete the molecular drawing.
  • Select the model and move it to the board; click it 2x’s.
  • Collect 1 /2 molecular models.
  • Zoom into the crate; insert the roller handle.
  • Collect the bellows.
  • Place the small weight onto the scale; collect the showcase inlay.
  • Move down once.

 

Mod

  • Collect 2/2 molecular models.
  • Move down once.

 

Showcase

  • Insert the showcase inlay to trigger a hidden objects area.

 

HO1

HO1

  • Find the items.
  • Collect the decorated chest.

 

Model

  • Click the decorated chest.
  • Insert the 2 molecular models; collect the element list.
  • Move ahead.

 

Elements

  • Place down the element list to trigger a mini game.
  • Solve the game by entering the correct number combinations to create the elements.
  • Use the following pattern to solve: 50 – 4 – 24 – 20 - 9
  • Collect 2/2 wooden tea sets.
  • Move to Helen’s Residence.

 

Wood Tea

  • Insert the 2 wooden tea sets; collect the lockbox drawing.
  • Move to Helen’s Laboratory.

 

Lockbox

  • Zoom into the crate and place down the lockbox drawing to trigger a mini game.
  • Solve the game by aligning the handles according to the diagram.
  • Use the following sequence to solve:
  • C – D – C – E – C – A – C – B
  • Collect the natural history key.
  • Move to the Cloister.

 

Natural

  • Insert the natural history key and click it once.
  • Move into the Natural History Laboratory.

 

Triangle

  • Click the bird figure.
  • Collect the triangle and click the glass case open.
  • Collect the fact card.
  • Click the hidden objects area.

 

HO2

HO2

  • Find the items based on the clues.
  • Collect the hummingbird.

 

Old Photo

  • Collect the note and 3 /3 old photographs.
  • Click the glass case open.
  • Move down once.

 

Old

  • Place the old photograph near the model.
  • Click the 3 windows as shown in the diagram.
  • Collect the wooden décor.
  • Move to the Natural History Lab.

 

Decor

  • Insert the wooden décor.
  • Move ahead.

 

Mush

  • Click the cabinet door; collect the mushroom glove.
  • Insert the hummingbird into the center of the table.
  • Move down once.

 

Mush Glove

  • Select the mushroom glove to collect the book pattern.
  • Move down once.

 

Book Pattern

  • Insert the book pattern.
  • Collect the cog.
  • Move to the Meeting Room.

 

Cog Game

  • Insert the cog to trigger a mini game.
  • Solve the game by moving the cog from one side of the maze to the other.
  • Use the following solution to solve: C –D – C – B – C – D – C – B – A x 2 – D – A x 3 – D – C – B – C – B – A – D – C – D – A – D – C – B x 2 – C x 2 – D x 2 – C – B – A – B – A – D
  • Collect the letter L and the shell fossil.
  • Move down once.

 

Shell

  • Insert the shell fossil.
  • Click the items aside; collect the registry plate.
  • Move ahead.

 

Registry

  • Place the registry plate.
  • Move into the Registry.

 

Panel

  • Click the panel.
  • Insert the letter L.
  • Place the stethoscope and click it 4x’s to trigger a hidden objects area.

 

HO3

  • Find the items.
  • Collect the magnet.

 

Tri

  • Collect the note and insert the triangle.
  • Collect the mechanical wing.
  • Move ahead.

 

Help

  • Collect the H.E.L.P. crest; click the 3 parts.
  • Collect the leather string.
  • Click the cabinet; collect the fact card.
  • Select the magnet to collect the small cannon.
  • Click the right arrow and click the cabinet.
  • Select the magnet to collect the wind up key.
  • Select the bellows to remove the cobwebs; collect 1 /3 Atlantis parts and the hose.
  • Move down once.

 

Small

  • Insert the small cannon.
  • Attach the hose and the leather string; click the valve.
  • Collect the fact card and the leather tube.
  • Click the leather tube and collect the quill.
  • Move to the Inventions Room.

 

Music Box

  • Select the music box to give the Sarah;  collect Sarah’s song.
  • Collect the stone slab.
  • Insert the wind up key and attach the mechanical wing.
  • Collect the insect.
  • Move to the Repository.

 

Insect

  • Select the insect to collect the valve.
  • Attach and click the valve to trigger a hidden objects area.

 

HO4

HO4

  • Find the items.
  • Collect the shell.

 

Shell Game

  • Click the shell open to trigger a mini game.
  • Solve the game by matching the pearls until there is only one remaining.
  • Receive the pearl and the sharp shell.
  • Move to the Inventions Room.

 

Sharp

  • Select the sharp shell to slice the ropes.
  • Click the box; collect 2/ 3 Atlantis parts and the ink bottle.
  • Collect the fact card.
  • Select the quill to write on the paper.
  • Click the up arrow and select the ink bottle and pour it into the tube.
  • Collect the symbols.
  • Place the pearl into the glass box to trigger a mini game.
  • Solve the game by sliding the tiles to move the pearl to the exit on the upper right.
  • Use the following solution to solve: B – up , B – right , A – up , C – left, E – left, D – left, G – down , F – right , A – up , B – left, F –down , A – right, B – up , B – right, H – down, I – left, J – left, A – up
  • Collect the sphere.
  • Move to the Meeting Room.

 

Symbols

  • Place the symbols onto the sphere to trigger a mini game.
  • Solve the game by clicking the 5 symbols.
  • Collect the book symbol and insert it into the center of the table.
  • Move to the Library.
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