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

བིལུ་པིརིན་ཊིརིག་གནས་དང་ལོ་རྒྱུས

རིག་གནས་དང་ལོ་རྒྱུས

བིལུ་པིརིན་ཊི ༡,༤༥༥ ཡོད • ཡན་ལག་དབྱེ་རིམ ༣

ཡན་ལག་དབྱེ་རིམ་ལྟ་བཤེར

དུས་རབས

དུས་རབས

གུང་གསེང་དང་དགའ་སྟོན

བིལུ་པིརིན་ཊི (༡,༤༥༥)

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

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

Astro གྱིས

དེང་རབས

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 གྱིས

རག་རྫས

Building an Arab Kamal — The Indian Ocean Navigator's Latitude Finder

Building an Arab Kamal — The Indian Ocean Navigator's Latitude Finder

Astro གྱིས

བར་དུས

Building a Merkhet — The Egyptian Star Transit Instrument for Finding True North

Building a Merkhet — The Egyptian Star Transit Instrument for Finding True North

Astro གྱིས

ཨི་ཇིབ

Building a Camera Obscura — Projecting the Sun and Eclipses Safely

Building a Camera Obscura — Projecting the Sun and Eclipses Safely

Astro གྱིས

སྔོན་རབས

Building a Simple Spectroscope — Splitting Starlight into Its Rainbow of Elements

Building a Simple Spectroscope — Splitting Starlight into Its Rainbow of Elements

Astro གྱིས

སྐར་ཚན་རིག

Building a Newtonian Reflecting Telescope — Mirrors Instead of Lenses

Building a Newtonian Reflecting Telescope — Mirrors Instead of Lenses

Astro གྱིས

Renaissance (1400–1600)

Building a Celestial Globe — Mapping the Stars on a Sphere

Building a Celestial Globe — Mapping the Stars on a Sphere

Astro གྱིས

བར་དུས

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 གྱིས

བར་དུས

Using a Viking Sunstone — Navigating by Polarized Skylight with Iceland Spar

Using a Viking Sunstone — Navigating by Polarized Skylight with Iceland Spar

Astro གྱིས

ཝཱི་ཀིང

Preparing a Viking Sunstone — Selecting and Cleaving Optical Calcite for Navigation

Preparing a Viking Sunstone — Selecting and Cleaving Optical Calcite for Navigation

Astro གྱིས

ཝཱི་ཀིང

Building a Mural Quadrant — The Wall-Mounted Instrument for Precise Star Positions

Building a Mural Quadrant — The Wall-Mounted Instrument for Precise Star Positions

Astro གྱིས

Renaissance (1400–1600)

Building a Galilean Telescope — The Instrument That Changed Our View of the Universe

Building a Galilean Telescope — The Instrument That Changed Our View of the Universe

Astro གྱིས

Renaissance (1400–1600)

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 གྱིས

Renaissance (1400–1600)

Building a Cross-Staff — The Medieval Navigator's Angle-Measuring Instrument

Building a Cross-Staff — The Medieval Navigator's Angle-Measuring Instrument

Astro གྱིས

བར་དུས

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 གྱིས

རག་རྫས

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 གྱིས

ལི་རྫས

Warping a Treadle Loom — Measuring, Beaming, and Threading Warp for Broadcloth

Warping a Treadle Loom — Measuring, Beaming, and Threading Warp for Broadcloth

Tex གྱིས

བར་དུས

Burling and Mending Woven Cloth — Cleaning and Repairing Fabric Before Fulling

Burling and Mending Woven Cloth — Cleaning and Repairing Fabric Before Fulling

Tex གྱིས

Cleaning

Pressing Broadcloth in a Screw Press — Hot and Cold Finishing for Lustre

Pressing Broadcloth in a Screw Press — Hot and Cold Finishing for Lustre

Tex གྱིས

བར་དུས