The persistent patience of microscopists and technical improvements like the "ultramicroscope" have greatly increased our knowledge of the invisible world of life.    From Wordnik.com.  [The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told] Reference

It is probably too small to be seen by any of our present microscopes, even the recently invented ultramicroscope.    From Wordnik.com.  [Insects and Diseases A Popular Account of the Way in Which Insects may Spread or Cause some of our Common Diseases] Reference

As mentioned, there are colloids which are so fine-grained that their particles cannot be distinguished even in the ultramicroscope.    From Wordnik.com.  [Nobel Prize in Chemistry 1925 - Presentation Speech] Reference

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.    From Wordnik.com.  [The Nobel Prize in Chemistry: The Development of Modern Chemistry] Reference

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.    From Wordnik.com.  [Nobel Prize in Chemistry 1925 - Presentation Speech] Reference

He used Zsigmond's ultramicroscope to study the Brownian movement of colloidal particles, so named after the Scottish botanist Robert Brown, and confirmed.    From Wordnik.com.  [The Nobel Prize in Chemistry: The Development of Modern Chemistry] Reference

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.    From Wordnik.com.  [Nobel Prize in Chemistry 1926 - Presentation Speech] Reference

This now settles on the invisible, colloidal gold particles so that they - the so-called gold nuclei - gradually increase in size, and finally become visible in the ultramicroscope.    From Wordnik.com.  [Nobel Prize in Chemistry 1925 - Presentation Speech] Reference

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.    From Wordnik.com.  [Nobel Prize in Chemistry 1925 - Presentation Speech] Reference

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.    From Wordnik.com.  [Nobel Prize in Chemistry 1925 - Presentation Speech] Reference

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.    From Wordnik.com.  [The Metal Monster] Reference

He further showed by a systematic study of the gold colloids that they can be produced in a varying distribution of fineness, onwards from colloids the particles of which are invisible even in the ultramicroscope, up to ones whose particles lie at the limit of visibility in the microscope.    From Wordnik.com.  [Nobel Prize in Chemistry 1925 - Presentation Speech] Reference

What I saw through that ultramicroscope was not an unproven theory, but a fact.    From Wordnik.com.  [The Girl in the Golden Atom] Reference

Mott and Marinesco made careful examinations of living cells, using even the ultramicroscope and agree that neither Nissl bodies nor neurofibrils are present in the living state.    From Wordnik.com.  [IX. Neurology. 1. Structure of the Nervous System] Reference