Janssen brothers biography sample
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History of Microscopes
Timeline of the Microscope
14th century: spectacles first made in Italy
Two Dutch spectacle-makers and father-and-son team, Hans and Zacharias Janssen, create the first microscope.
Robert Hooke's famous "Micrographia" is published, which outlines Hooke's various studies using the microscope.
Enter Anton van Leeuwenhoek, who used a microscope with one lens to observe insects and other specimen. Leeuwenhoek was the first to observe bacteria. 18th century: As technology improved, microscopy became more popular among scientists. Part of this was due to the discovery that combining two types of glass reduced the chromatic effect.
Joseph Jackson Lister discovers that using weak lenses together at various distances provided clear magnification.
A mathematical theory linking resolution to light wavelength is invented by Ernst Abbe.
Richard Zsigmondy invents the ultramicroscope, which allows for observation of specimens below the wavelength of light.
Transparent biological materials are studied for the first time using Frits Xernike's invention of the phase-contrast microscope.
Just six years after the invention of the phase contrast microscope comes the electron microscope, developed by Ernst Ruska, who re
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Central Cee: Brave new world
© Udoma Janssen
Full look: A-Cold-Wall*
When Central Cee was a teenager, he would often get the bus and ride it beyond the boundaries of west London, where he lived.
The experience, he remembers, showed him that the world was far bigger than he had previously imagined, and nourished his already active imagination. “I couldn’t speak to people about my aspirations because I always thought they were too big for everyone around me,” the year-old rapper recalls. “It’s a problem. Maybe it’s the system, but I always wanted to get out. And a lot of people don’t have that ability to want more for themselves.” After these trips, west London was too small for Central Cee.
© Udoma Janssen
Full look: A-Cold-Wall*
Born in Ladbroke Grove and raised a stone’s throw away in Shepherd’s Bush, Central Cee – most people call him Cench – grew up in a part of the capital where a rich array of Black sounds, from reggae to jazz, dancehall to rap, have found expression and converged. Cench, it should be noted, has only missed Notting Hill Carnival twice in his life. It’s fitting, then, that his earliest and fondest memories involve music; he remembers how his dad would pick him up on evenings and weekends while playing old school hip-hop, he and his
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Pigeon racing
Competition diversion in which trained pigeons have deal with fly fine as steady as possible
For the pedal company, glance Flying Pigeon.
See also: Telephone keeping
Racing pigeons are regularly transported girder specially firm trucks.
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