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Lantern Slides A. K. Christensen

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Lantern Slides A. K. Christensen In the early days of biological electron microscopy (in the 1950s and 1960s) it was standard practice to prepare electron micrographs ... – PowerPoint PPT presentation

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Title: Lantern Slides A. K. Christensen


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Lantern Slides A. K. Christensen
  • In the early days of biological electron
    microscopy (in the 1950s and 1960s) it was
    standard practice to prepare electron micrographs
    for projection in lectures as 3-1/4 x 4" lantern
    slides. It was felt that 2 x 2" projection
    slides were too small to transmit the detail and
    quality that was necessary for electron
    micrographs. As a consequence, giving a lecture
    required two different projectors, one for
    lantern slides and the other for Kodachromes or
    other 2 x 2" slides. By about 1970 it had become
    apparent that the slight resolution benefit of
    lantern slides was not worth the pain of having
    to deal with two projectors during a lecture. So
    everyone switched to using only 2 x 2" slides. I
    threw away almost all of my lantern slides, but
    kept a slide box containing some of my favorites.
    Of course, in the 1990s the 2 x 2" projection
    slides were all replaced by digital images in
    PowerPoint. The present PowerPoint shows
    digitized images of the old lantern slides that I
    kept.

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