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Join this channel to get access to perks: Want to learn more about Periscope Film and get access to exclusive swag? Join us on Patreon. Visit Visit our website This 1950s educational film “Measuring Short Distances“ is narrated by Professor Dorothy Montgomery. Montgomery explains the different orders of measurement and how these can be observed. The objects measured in the film get continuously smaller and the footage compares each item to the previous one to demonstrate how the order of magnitude have changed. The footage is mostly of microscopes and what can be seen through them. Finally, there is footage of the atomic structure of an object as seen under a new type of electron microscope. 0:23: Title “Physical Science Study Committee Presents”, 0:31 Title “Measuring Short Distances: Professor Dorothy Montgomery”, 0:42 Men measuring different things, 1:02 Narrator is shown talking in front of a Microscope, 1:33 Narrator shows a meter stick and demonstrates the different markings, 2:15 Narrator shows a stage micrometer, 2:26 Narrator puts stage micrometer on the microscope, 3:01 comparison between millimeter scale to micrometer scale, 3:22 Measuring the thickness of a strand of hair under microscope, 3:40 Narrator puts powder on the microscope slide, 4:06 Demonstration of an ocular scale under the microscope, 5:03 Narrator measures the diameter of the powder pieces under the microscope, 5:23 Flower under the microscope with particles of varying sizes, 5:42 Bacteria under the microscope, 6:40 Demonstration of resolution by showing two different spots, 7:45 Crux tube demonstration of its electron gun, 8:06 electron gun turned on in the dark, 8:44 Scientist operates an electron microscope in a lab, 9:30 sample picture of bacteria looked at under an electron microscope, 9:50 comparison of the same bacteria seen under visible light, 10:05 Virus particles under an electron microscope, 10:33 Scientist prepares a crystal specimen with a microtone, 11:01 View of a crystal under the electron microscope, 12:30 Dr. Erwin Müller at Penn State University talks in his laboratory, 12:48 field electron microscope shown, 13:02 Dr. Müller makes a sketch of the glass vessel and explains how the microscope functions, 13:39 Dr. Müller makes another sketch to demonstrate the degree of resolution you get with this microscope and the formula that allows this to be calculated, 14:39 needle and pen compared under a regular microscope, 15:02 tip of the needle clearly shown under electron microscope, 15:16 Field Electron Microscope is being turned on, 15:37 Tip of needle shown under the Field Electron Microscope, 15:43 Model of a molecule at the atomic level, 16:05 footage of the molecules appearing on the surface of the needle as they are added,16:45 Dr. Müller shown constructing a field ion microscope and preparing it for a demonstration, 17:54 a picture of atoms on a platinum crystal under the field ion microscope, 18:25 picture of the molecular structure of Tungsten, 18:38 model constructer of the molecular structure of a tungsten needle tip, 19:03 temperature raised on object under microscope and the atoms begin moving in a time lapse, 20:01 Title “The End” We encourage viewers to add comments and, especially, to provide additional information about our videos by adding a comment! See something interesting? Tell people what it is and what they can see by writing something for example: “01:00:12:00 -- President Roosevelt is seen meeting with Winston Churchill at the Quebec Conference.“ This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit
