First Day Cover: Binocular-Microscope about 1860 (Germany, Federal Republic 1981)
Binocular-Microscope about 1860 (Germany, Federal Republic 1981)
10 April (Germany, Federal Republic ) within release Youth: Optical Instruments goes into circulation First Day Cover Binocular-Microscope about 1860 face value 60+30 German pfennig
| First Day Cover Binocular-Microscope about 1860 in catalogues | |
|---|---|
| Michel: | Mi:DE FDC1092 |
First Day Cover is horizontal format.
Also in the issue Youth: Optical Instruments:
- First Day Cover - Optical instruments face value 40+20;
- First Day Cover - Telescope about 1770 face value 50+25;
- First Day Cover - Binocular-Microscope about 1860 face value 60+30;
- First Day Cover - Octant 1775 face value 90+45;
First Day Cover Binocular-Microscope about 1860 it reflects the thematic directions:
Geodesy is the science of measuring and representing the geometry, gravity, and spatial orientation of the Earth in temporally varying 3D. It is called planetary geodesy when studying other astronomical bodies, such as planets or circumplanetary systems
Elements of industrial instrumentation have long histories. Scales for comparing weights and simple pointers to indicate position are ancient technologies. Some of the earliest measurements were of time. One of the oldest water clocks was found in the tomb of the ancient Egyptian pharaoh Amenhotep I, buried around 1500 BCE. Improvements were incorporated in the clocks. By 270 BCE they had the rudiments of an automatic control system device.
An optical instrument is a device that processes light waves (or photons), either to enhance an image for viewing or to analyze and determine their characteristic properties. Common examples include periscopes, microscopes, telescopes, and cameras.
