Hard Knocks Crafting Club (スパルタ工作クラブ Suparuta Kōsaku Kurabu) is the fifty-third chapter of Dr. Stone manga.


Senku uses Chrome and Kaseki's water wheel to make a water powered generator, Gen Asagiri praises Senku for his accomplishments; Senku tells Gen to to thank the two who made the wheel. Senku comes up with an idea to store the electricity by using lead plates in a sulfuric acid solution stored in a glass container.

Ginro and Kinro are relieved that they do not have to power the generator by hand, but the water wheel will. Kohaku grins that the fighters can focus on training instead of powering the generator. Senku also uses the water generator to automate the iron furnace, and upgrade it to level 3. Kohaku's father is delighted by this, because now the more people can focus on collecting food for the winter.

Senku then tells Gen that he will be making a light bulb next by use mercury to trap air, Gen then expresses that nothing can surprise him anymore.

The scene then later skips two months later, and winter arrived and they light up a large Christmas tree with their new invention; the light bulb. Chrome then proposes the idea of going mining, because now they can go deeper into the caves because of their new invention. Chrome, Senku, and Gen, start their excavation in to the depths of the caves.

Character in Order of Appearance


Site Navigation

v  e
Arcs & Sagas
Prologue Saga
Stone Formula Arc
Chapters 1234
Episodes 12
Vs. Tsukasa Arc
Chapters 56789101112
Episodes 345
Stone World: The Beginning Saga
Kingdom of Science Arc
Chapters 131415161718192021222324252627282930313233
Episodes 567891011
Village Games Arc
Chapters 34353637383940
Village Origins Arc
Chapters 4142434445
Stone Wars Saga
Vs. Hyoga Arc
Chapters 4647484950
Communications Arc
Chapters 5152535455565758596061626364656667686970717273747576777879808182
Source of the Petrification Saga
Age of Exploration Arc
Chapters 8384858687888990919293949596979899 100
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120
Community content is available under CC-BY-SA unless otherwise noted.