Wilder T4 astronomical theodolite
"Wilder T4 astronomical theodolite" is a high-precision angle measuring instrument designed for astronomical observation. It is mainly used to determine the position, trajectory and atmospheric refraction of celestial bodies (such as stars, planets, comets). In its name, "Wild" usually refers to the manufacturer of traditional astronomical instruments in Germany or Switzerland. "T4" is the model code and represents its technical iteration version. "Astronomical Theodolite" defines its core function-to realize precise measurement of azimuth and altitude of celestial bodies through telescope and dial system.
Nineteenth-century 10-inch theodolite
Universal solar ring for astronomical instruments in the eighteenth century
This instrument was manufactured around 1760 and was one of the most advanced astronomical measurement tools of the time. By using the Universal Dayring, astronomers can accurately measure the position of the sun during the day to determine time and orientation. This instrument was widely used in the 18th century to help astronomers with celestial observation and navigation.
Eighteenth-century measuring instrument theodolite
A theodolite is a precision instrument used to measure horizontal and vertical angles. It was made in 1752 and is commonly used in geographic mapping and engineering. Theodolite belongs to the early measuring instrument, which is very precise in design and technology, which laid the foundation for the later measuring instrument. In the 1752 theodolite, craftsmen used precision machining techniques to ensure the accuracy of the measurement. These early theodolites played an important role in geographic mapping, engineering construction and astronomical research, helping people to accurately determine position and angle.
Ophthalmoscope, an ophthalmic instrument invented in 1850
The ophthalmic instrument, Helmholtz also known as the ophthalmoscope, was invented in 1850 by the German scientist Hermann von Helmholtz (Hermann von Helmholtz). The main function of this instrument is to allow ophthalmologists to observe the retinal details of the living eye. The ophthalmoscope allows the doctor to see the structures inside the eye by reflecting light that enters the pupil. The invention of this instrument has greatly promoted the development of ophthalmology, allowing doctors to diagnose eye diseases and prevent them. Before Helmholtz invented the ophthalmoscope, doctors could not see the posterior pole of the retina in the eye of a living patient.
19th century instrument portable travel theodolite
16th century astronomical instrument sundial
Nineteenth Century Instrument Orthogonal Plane Meter
Orthogonal planer is an instrument for measuring the area of a plane, invented around 1851. Its design is based on the principle of orthogonality, and its area is calculated by measuring the boundary of the plane figure. Orthogonal planometers usually consist of a rod with a scale and a moving pointer. The user can record the measurement data by moving the pointer along the boundary of the figure.
Seventeenth Century Astronomical Instrument Hand-held Folding Ivory Sundial
Twenties measuring instrument cup cross anemometer
Seventeenth Century Astronomical Instruments Small Ring Sundial
The ring sundial was a sophisticated instrument used to measure time at the time. Its design combines science, technology and art, symbolizing the era's quest for time and astronomical knowledge. The working principle of the ring sundial is based on the position of the sun, and the time is determined by reading the projection of the sun on the dial.
Eighteenth-century astronomical instrument cube sundial
The cube sundial is a scientific instrument used to determine time. In the 18th century, the sundial was an important time-measuring tool that scientists and explorers relied on for astronomical observation and navigation.
geological multi-purpose compass
Simple seismic recorder (3D demonstration animation)
Laboratory test tube centrifuge equipment
Portable metal detector
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Microgravity Science Glove Box ISS-MSG
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Antique astronomical theodolite
Theodolites are measuring instruments designed based on the principle of angle measurement to measure horizontal and vertical angles. They are divided into two types: optical theodolites and electronic theodolites, with the most commonly used being electronic theodolites. The theodolite is the mechanical part of a telescope that allows it to point in different directions. The theodolite has two mutually perpendicular axes to adjust the azimuth and horizontal height of the telescope. A theodolite is a type of angle measuring instrument equipped with a sighting section, a horizontal dial and reading indicators, and a vertical dial and reading indicators.
Celestial globe
The celestial globe is a general term for the celestial globe and the celestial globe. The armillary sphere is an instrument used to measure the spherical coordinates of celestial bodies, while the celestial globe was an instrument used in ancient times to demonstrate celestial phenomena. The armillary sphere and the celestial globe are instruments that reflect the theory of the celestial sphere. The inventor of the armillary sphere is said to be Luo Xiahong from the Western Han Dynasty, who was improved by scientist Zhang Heng during the Eastern Han Dynasty. The earliest existing armillary sphere in China was manufactured during the Ming Dynasty and is displayed at the Purple Mountain Observatory in Nanjing.
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