On the Methodological Value of Glass: Starting from the Development of Modern Natural Science
title: "On the Methodological Value of Glass: Starting from the Development of Modern Natural Science" slug: "fanchunping-glass-methodological-value.en" date: "2018-01-01" category: "science-comm" author: "Fan Chunping" excerpt: "In scientific research, inventing a good tool is often more important than the scientific discovery itself. Glass is the midwife of modern natural science—telescopes, microscopes, thermometers, test tubes... without glass, there would be no modern science."
On the Methodological Value of Glass: Starting from the Development of Modern Natural Science
Author: Fan Chunping (Senior Editor, School of Humanities and Social Sciences, Beijing Institute of Technology)
In scientific research, inventing a good tool is often more important than the scientific discovery itself. Scientific instruments are extensions of human senses—the material embodiment of rational methods of knowing.
The development of modern natural science has largely taken the form of theoretical synthesis based on data obtained through observation and experimentation. Among the instruments used for observation and experimentation, glass products are arguably the most widely employed. Glass possesses the combined properties of transparency, lightness, malleability, corrosion resistance, abrasion resistance, and electrical insulation. Looking across the history of science, virtually every branch of natural science has, in its development, intersected with glass. Glass is the midwife of modern natural science.
I. Glass and Its Origins
Glass is an inorganic, non-metallic material, originally produced by firing a mixture of sand, lime, and soda. Large-scale glass production began in ancient Egypt as early as 3000 BCE, though it was not until the beginning of the Common Era that people learned to make glass transparent. The ancient Chinese began making glass as early as the Western Zhou dynasty, but the technique was lost and rediscovered several times.
In the 14th century, Italy pioneered the manufacture of eyeglasses. In the early 17th century, the telescope and the microscope were invented, more or less by accident. From that point on, the applications of glass took on a wholly different significance.
II. The Telescope Opened Up Modern Astronomy
The telescope was humanity's first artificial sensory organ used for scientific research. In 1609, Galileo built the first astronomical telescope, through which he discovered the phases of Venus predicted by Copernican theory, found the moon to be uneven and covered in craters, discovered Jupiter's four small satellites, and saw that the Milky Way was composed of countless small stars. It was these irrefutable facts that defended and enriched Copernican theory.
Thereafter, a succession of astronomical discoveries—Halley's Comet, stellar proper motion, Kant's nebular hypothesis, the discovery of Neptune—were all intimately linked to the telescope. The history of astronomy became, in effect, the history of glass optical instruments.
III. Manipulating Light with Glass
The transparent and malleable properties of glass enabled humanity to command light. Newton's experiment in dispersing white light with a glass prism marked the beginning of the study of physical optics. Fraunhofer's diffraction grating established the modern experimental method for spectroscopy. Kirchhoff and Bunsen used the bright lines in spectra as indicators of the presence of elements, leading the scientific community to rapidly discover over a dozen new elements.
Glass is the pillar of optics; one could say that without glass, there would be no optics.
IV. The Microscope Made Biology a Comprehensive Science
For the first time, the microscope revealed to humanity a third kingdom of life, beyond plants and animals—the microbial world.
Malpighi used a microscope to observe the pulmonary capillaries of a frog, establishing the theory of blood circulation. Leeuwenhoek discovered animal sperm and eggs. Robert Hooke discovered the cell. Schleiden and Schwann proposed cell theory. Pasteur laid the foundations of microbiology. Virchow founded cellular pathology.
The vast majority of modern biology was conducted under the microscope.
V. Chemistry Was Once the Science of the Test Tube
Without lightweight, transparent, corrosion-resistant, and malleable glass, there would be no chemistry as we know it. Boyle discovered the gas laws with the aid of glass tubes, which led to Dalton's atomic theory.
Glass is the cradle of chemistry.
VI. Glass in Mechanics, Thermodynamics, and Electricity
In 1593, Galileo built the first thermometer. In 1643, Torricelli used a narrow glass tube sealed at one end to conduct his atmospheric pressure experiment, inventing the barometer and producing a vacuum. In the study of static electricity, electric charges were once classified as "vitreous electricity" and "resinous electricity." The Leyden jar was also a glass jar—an epoch-making instrument in the history of electrical science.
VII. Modern Science Should Continue to Exploit the Properties of Glass
Scientific instruments are the bridge through which scientific workers connect with the objects of their study. With its unique properties of transparency, malleability, and corrosion resistance, glass continues to play an irreplaceable role in modern scientific instrumentation.
Published in a related academic journal