No coin nor oath required. For personal study only.
Dr. Parpart pointed out that the new technique enabled examination of either slow or rapid motion of material under a microscope at magnifications which formerly could have been "watched" only by motion picture photography. This method offered no effective way of monitoring what the camera was shooting and required such an intense light source that living material was either killed or injured, he said. With the low light levels needed for televising the microscopic scene, living material can be examined for many hours without damage.
Mr. Flory said that enlargement of the image up to 15 to 20 times through the television system made for ease of viewing and made the equipment particularly adaptable for classroom or conference use. Even larger enlarge-" ments are feasible by projection of the image onto a screen, he said.
Commenting on his research with the RCA equipment in a recent letter to Dr. Zworykin, Dr. Parpart stated: "It has been possible to observe certain microscopic particles in cells in active Brownian motion that have not been observed before; it has been possible to expose various egg cells, red cells and plant cells to light of different wave lengths and thus be able to study at a particular wave length, details of cellular structure that are not clear or not observable visually.
"For example, in eggs of the sea urchin, the violet-sensitive tube will pick out the echinochrome granules and exclude yolk and protein.granules. The latter granules are well defined under the red-sensitive tube while the echinochrome granules are apparently absent. This ability to see details by selective absorption at narrow wave lengths is a very real advantage."
Dr. Parpart has used the equipment primarily in studies of a wide variety of marine life at the Marine Biological Laboratory, Woods Hole, Mass. Besides its value in other branches of biology, the technique should be of importance in medicine, chemistry, geology, physics and other fields of research.
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