ultramicroscope

The persistent patience of microscopists and technical improvements like the "ultramicroscope" have greatly increased our knowledge of the invisible world of life.

The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told J. Arthur Thomson 1897

He did this with the aid of an instrument, the ultramicroscope, which he had developed in collaboration with scientists at the Zeiss factory in Jena.

The Nobel Prize in Chemistry: The Development of Modern Chemistry 2010

He used Zsigmond's ultramicroscope to study the Brownian movement of colloidal particles, so named after the Scottish botanist Robert Brown, and confirmed

The Nobel Prize in Chemistry: The Development of Modern Chemistry 2010

They blinked and faded like motes within a shifting sunbeam; or, to use a more scientific comparison, like colloids within the illuminated field of the ultramicroscope; and like these latter it was as though the eyes took in not the minute particles themselves but their movement only.

The Metal Monster 2004

With the ultramicroscope, and especially the improved type which is called the immersion ultramicroscope, progress has been such that particles with a diameter of down to 8 mm are recognized with arc-light illumination, and down to 4 mm when using the sun as the light source.

Nobel Prize in Chemistry 1925 - Presentation Speech 1966

Zsigmondy now found that various gold colloids prepared by him contained delimited particles under the ultramicroscope although they had appeared completely homogeneous under an ordinary microscope.

Nobel Prize in Chemistry 1925 - Presentation Speech 1966

During this period he discovered how to prepare reproducibly gold hydrosols and also developed the slit-ultramicroscope in joint collaboration with Siedentopf.

Richard Zsigmondy - Biography 1966

As mentioned, there are colloids which are so fine-grained that their particles cannot be distinguished even in the ultramicroscope.

Nobel Prize in Chemistry 1925 - Presentation Speech 1966

This difficult problem was brought a decisive step nearer to its solution by the invention of the ultramicroscope at the beginning of the 20th century.

Nobel Prize in Chemistry 1925 - Presentation Speech 1966

By means of the ultramicroscope it has been possible to observe a similar, only much livelier movement with very much smaller particles of a colloidal nature.

Nobel Prize in Chemistry 1926 - Presentation Speech 1966