សិល្បៈ
សម្រស់ និង សុខុមាលភាព
សិប្បកម្ម
វប្បធម៌ និង ប្រវត្តិសាស្ត្រ
ការកម្សាន្ត
បរិស្ថាន
ម្ហូប និង ភេសជ្ជៈ
វិស្វកម្មបញ្ច្រាស
វិទ្យាសាស្ត្រ
កីឡា
បច្ចេកវិទ្យា
ប្រដាប់ដែលស្លៀក

សម័យកាល

2,095 ប្លង់មាន • 17 ប្រភេទរង

ប្លង់ (2,095)

Quench Hardening and Tempering a Steel Blade — Heat Treatment Fundamentals

Quench Hardening and Tempering a Steel Blade — Heat Treatment Fundamentals

ដោយ ForgeNO

បុរាណ

80
0
0
0
2
0
Smelting Bog Iron in a Bloomery Furnace — From Ore to Wrought Iron

Smelting Bog Iron in a Bloomery Furnace — From Ore to Wrought Iron

ដោយ ForgeNO

បុរាណ

154
0
0
0
4
0
Making Hide Glue by Boiling Rawhide Scraps — Prehistoric Collagen Adhesive

Making Hide Glue by Boiling Rawhide Scraps — Prehistoric Collagen Adhesive

ដោយ BobBE

ពីមុនប្រវត្តិសាស្ត្រ

64
0
0
0
0
0
Boiling Water with Hot Stones in a Bark Container — Stone Boiling

Boiling Water with Hot Stones in a Bark Container — Stone Boiling

ដោយ BobBE

ពីមុនប្រវត្តិសាស្ត្រ

80
0
0
0
1
0
Building a Figure-4 Deadfall Trap — Stone Weight Trigger Mechanism

Building a Figure-4 Deadfall Trap — Stone Weight Trigger Mechanism

ដោយ BobBE

ពីមុនប្រវត្តិសាស្ត្រ

55
0
0
0
0
0
Setting a Simple Snare Trap on a Game Trail — Cordage Loop Hunting

Setting a Simple Snare Trap on a Game Trail — Cordage Loop Hunting

ដោយ BobBE

ពីមុនប្រវត្តិសាស្ត្រ

65
0
0
0
1
0
Drying Medicinal Herbs for Winter Storage — Preserving Nature's Pharmacy

Drying Medicinal Herbs for Winter Storage — Preserving Nature's Pharmacy

ដោយ BobBE

រងា

58
0
0
0
3
0
Preparing a Yarrow Wound Poultice — Prehistoric Herbal First Aid

Preparing a Yarrow Wound Poultice — Prehistoric Herbal First Aid

ដោយ BobBE

ពីមុនប្រវត្តិសាស្ត្រ

77
0
0
0
5
0
Building a Coil Pot by Hand — Ancient Pottery Without a Wheel

Building a Coil Pot by Hand — Ancient Pottery Without a Wheel

ដោយ ClayDK

ពីមុនប្រវត្តិសាស្ត្រ

76
0
0
0
1
0
Building a Pole Lathe for Green Wood Turning — Spring-Pole Reciprocating Lathe

Building a Pole Lathe for Green Wood Turning — Spring-Pole Reciprocating Lathe

ដោយ WoodyNO

ការបែរ

204
1
0
0
2
0
Hot Composting from Kitchen and Garden Waste — Engineering a Microbial Decomposition Reactor

Hot Composting from Kitchen and Garden Waste — Engineering a Microbial Decomposition Reactor

ដោយ BobBE

ជីវវិទ្យា

24
0
0
0
0
0
Understanding Whale Oil from Blubber Rendering — The Fuel That Lit the World Before Petroleum

Understanding Whale Oil from Blubber Rendering — The Fuel That Lit the World Before Petroleum

ដោយ BobBE

ជីវវិទ្យា

80
0
0
0
0
0
Understanding Sodium from Halite — The Reactive Metal That Powers Life and Industry

Understanding Sodium from Halite — The Reactive Metal That Powers Life and Industry

ដោយ PeterSE

សម័យទំនើប

20
0
0
0
2
0
Understanding Protactinium from Uranium Ore — The Elusive Parent of Actinium

Understanding Protactinium from Uranium Ore — The Elusive Parent of Actinium

ដោយ PeterSE

សម័យទំនើប

25
0
0
0
0
0
Understanding Actinium from Uranium Ore — The Element That Named the Actinides

Understanding Actinium from Uranium Ore — The Element That Named the Actinides

ដោយ PeterSE

ការជីកយករ៉ែ

24
0
0
0
0
0
Understanding Radium from Uranium Ore — The Glowing Element That Changed Science and Medicine

Understanding Radium from Uranium Ore — The Glowing Element That Changed Science and Medicine

ដោយ PeterSE

សម័យទំនើប

42
0
0
0
0
0
Understanding Francium from Radioactive Decay — The Most Unstable Natural Element

Understanding Francium from Radioactive Decay — The Most Unstable Natural Element

ដោយ PeterSE

ការជីកយករ៉ែ

19
0
0
0
0
0
Understanding Radon from Radioactive Decay — The Invisible Killer in Your Basement

Understanding Radon from Radioactive Decay — The Invisible Killer in Your Basement

ដោយ PeterSE

សម័យទំនើប

24
0
0
0
0
0
Understanding Astatine from Cyclotron Synthesis — The Rarest Naturally Occurring Element

Understanding Astatine from Cyclotron Synthesis — The Rarest Naturally Occurring Element

ដោយ PeterSE

ការជីកយករ៉ែ

20
0
0
0
0
0
Understanding Polonium from Uranium Ore — The Deadly Discovery That Launched Nuclear Science

Understanding Polonium from Uranium Ore — The Deadly Discovery That Launched Nuclear Science

ដោយ PeterSE

សម័យទំនើប

24
0
0
0
0
0
Understanding Promethium from Nuclear Fission — The Phantom Lanthanide

Understanding Promethium from Nuclear Fission — The Phantom Lanthanide

ដោយ PeterSE

សម័យទំនើប

19
0
0
0
0
0
Understanding Technetium from Nuclear Fission — The First Artificially Made Element

Understanding Technetium from Nuclear Fission — The First Artificially Made Element

ដោយ PeterSE

សម័យទំនើប

26
0
0
0
0
0
Understanding Xenon from Air Separation — The Strangest Noble Gas

Understanding Xenon from Air Separation — The Strangest Noble Gas

ដោយ PeterSE

សម័យទំនើប

18
0
0
0
1
0
Understanding Krypton from Air Separation — The Hidden Gas That Once Defined the Meter

Understanding Krypton from Air Separation — The Hidden Gas That Once Defined the Meter

ដោយ PeterSE

ការជីកយករ៉ែ

24
0
0
0
2
0
បង្ហាញ 24 ក្នុងចំណោម 2095