སྒྱུ་རྩལ
མཛེས་སྡུག་དང་བདེ་ཐང
བཟོ་རིག
རིག་གནས་དང་ལོ་རྒྱུས
དགའ་སྟོན
ཁོར་ཡུག
ཟས་དང་བཏུང་རྫས
ཕྱིར་འཕྲུལ་རིག
ཚན་རིག
རྩེད་འགྲན
རིག་རྩལ
གྱོན་རུང

ལྕགས་བཟོ

བིལུ་པིརིན་ཊི ༧༣༥ ཡོད • ཡན་ལག་དབྱེ་རིམ ༧

བིལུ་པིརིན་ཊི (༧༣༥)

Making Blister Steel by Cementation — Carburizing Wrought Iron into Steel

Making Blister Steel by Cementation — Carburizing Wrought Iron into Steel

Balin གྱིསUS

དེང་རབས

༧༦
༠
༠
༠
༡
༠
Puddling Wrought Iron from Pig Iron — Burning Out the Carbon in a Reverberatory Furnace

Puddling Wrought Iron from Pig Iron — Burning Out the Carbon in a Reverberatory Furnace

Palpatine གྱིསUS

དེང་རབས

༦༡
༠
༠
༠
༦
༠
Smelting Pig Iron in a Coke Blast Furnace — Molten Iron at Industrial Scale

Smelting Pig Iron in a Coke Blast Furnace — Molten Iron at Industrial Scale

Elrond གྱིསUS

དེང་རབས

༦༤
༠
༠
༠
༥
༠
Making Coke from Coal — The Smokeless Fuel That Forged the Industrial Revolution

Making Coke from Coal — The Smokeless Fuel That Forged the Industrial Revolution

Gimli གྱིསUS

དེང་རབས

༦༩
༠
༠
༠
༤
༠
Building a Roman Ballista — The Torsion-Powered Bolt Thrower

Building a Roman Ballista — The Torsion-Powered Bolt Thrower

Emma གྱིསSE

རོ་མ

༢༧༤
༠
༠
༠
༠
༠
Building a Roman Undershot Water Mill — Grain Milling by Hydraulic Power

Building a Roman Undershot Water Mill — Grain Milling by Hydraulic Power

Emma གྱིསSE

རོ་མ

༥༢
༠
༠
༠
༡
༠
Polishing a Bronze Mirror — The First Reflective Surface Made by Human Hands

Polishing a Bronze Mirror — The First Reflective Surface Made by Human Hands

Forge གྱིསNO

སྔོན་རབས

༨༠
༠
༠
༠
༠
༠
Greek Fire — The Byzantine Superweapon Whose Secret Died with an Empire

Greek Fire — The Byzantine Superweapon Whose Secret Died with an Empire

Charlie གྱིསDE

བར་དུས

༦༠
༡
༠
༠
༠
༠
Building a Counterweight Trebuchet — The Medieval Siege Engine That Toppled Castles

Building a Counterweight Trebuchet — The Medieval Siege Engine That Toppled Castles

Emma གྱིསSE

བར་དུས

༩༧
༠
༠
༠
༡
༠
Smelting Wootz Crucible Steel — The Indian Secret Behind Damascus Blades

Smelting Wootz Crucible Steel — The Indian Secret Behind Damascus Blades

Forge གྱིསNO

སྔོན་རབས

༡༡༨
༠
༠
༠
༠
༠
Building a Horizontal Water Wheel for Grain Milling — The First Mechanical Power Source

Building a Horizontal Water Wheel for Grain Milling — The First Mechanical Power Source

Emma གྱིསSE

བཀྲུས

༦༣
༠
༠
༠
༤
༠
Building Chinese Fire Arrows — The First Rockets in Human History
ཉེན་ཁ་ཅན།

Building Chinese Fire Arrows — The First Rockets in Human History

Charlie གྱིསDE

སྔོན་རབས

༡༣༦
༠
༠
༠
༡
༠
Building a Song Dynasty Fire Lance — The World's First Gunpowder Weapon
ཉེན་ཁ་ཅན།

Building a Song Dynasty Fire Lance — The World's First Gunpowder Weapon

Charlie གྱིསDE

སྔོན་རབས

༡༠༦
༡
༠
༠
༤
༠
Casting and Grinding a Speculum Metal Telescope Mirror — Newton's Reflecting Alloy

Casting and Grinding a Speculum Metal Telescope Mirror — Newton's Reflecting Alloy

Astro གྱིསIS

མདོངས་རིག

༨༣
༠
༠
༠
༡
༠
Making Tin-Lead Solder — The Ancient Alloy That Joins Metals Without a Forge
ཉེན་ཁ་ཅན།

Making Tin-Lead Solder — The Ancient Alloy That Joins Metals Without a Forge

Peter གྱིསSE

སྔོན་རབས

༥༥
༠
༠
༠
༢
༠
Building a Mariner's Sextant — The Instrument That Conquered the Oceans

Building a Mariner's Sextant — The Instrument That Conquered the Oceans

Astro གྱིསIS

དེང་རབས

༧༦
༠
༠
༠
༠
༠
Building a Universal Ring Dial — The Portable Brass Instrument That Tells Time by the Sun

Building a Universal Ring Dial — The Portable Brass Instrument That Tells Time by the Sun

Astro གྱིསIS

Renaissance (1400–1600)

༧༥
༠
༠
༠
༠
༠
Building a Celestial Globe — Mapping the Stars on a Sphere

Building a Celestial Globe — Mapping the Stars on a Sphere

Astro གྱིསIS

བར་དུས

༥༥
༠
༠
༠
༠
༠
Building a Nocturnal — The Medieval Star Clock That Tells Time by Polaris

Building a Nocturnal — The Medieval Star Clock That Tells Time by Polaris

Astro གྱིསIS

བར་དུས

༦༡
༠
༠
༠
༠
༠
Building a Copernican Orrery — A Mechanical Model of the Heliocentric Solar System

Building a Copernican Orrery — A Mechanical Model of the Heliocentric Solar System

Astro གྱིསIS

Renaissance (1400–1600)

༨༣
༠
༠
༠
༣
༠
Building a Brass Astrolabe — The Islamic Golden Age Instrument That Mapped the Sky

Building a Brass Astrolabe — The Islamic Golden Age Instrument That Mapped the Sky

Astro གྱིསIS

སྔོན་རབས

༨༧
༠
༠
༠
༧
༠
Building a Chinese Armillary Sphere — The Bronze Instrument That Mapped the Heavens

Building a Chinese Armillary Sphere — The Bronze Instrument That Mapped the Heavens

Astro གྱིསIS

སྔོན་རབས

༩༥
༠
༠
༠
༣
༠
Drawing Wire Through a Drawplate — Reducing Iron Rod to Fine Wire

Drawing Wire Through a Drawplate — Reducing Iron Rod to Fine Wire

Forge གྱིསNO

ལྕགས་བཟོ

༥༤
༠
༠
༠
༤
༠
Casting a Pewter Spoon in a Soapstone Mould — Low-Temperature Metal Casting

Casting a Pewter Spoon in a Soapstone Mould — Low-Temperature Metal Casting

Forge གྱིསNO

བར་དུས

༥༣
༠
༠
༠
༠
༠
735 ནང་ལས་ 24 སྟོན་དོ།