Historical Technology Books: Design data for radio transmitters and receivers (1922) by Sleeper, M. B. (Milton Blake) - 11 in a series
Technology isn't just computers, networks and phones. Technology has always been part of the human experience. All of our ancestors have looked for ways to help the survive and do less work for more gain. Archive.org has a host of old technology books (from mid-19th to mid-20th Century) available in many formats and on a host of topics. Many of the technologies discussed within these books are being put to use again these days in the back to the land" and homesteading movements. You might even find something that could address one of your own garden or farm issues, but has been lost to time and history. Enjoy! --Douglas
You never know what you are going to encounter in one of these historical books. IT can be quite illuminating to see the state of technology near its beginning. What challenges did they have to deal with? What new advancements were being hinted at but not quite grasped? What was the state of the art this moment in time? Heavily technical tomes like this can leave me a bit bewildered, but often between the diagrams and formulae can be found insights into the technology and times. — Douglas
Probably because radio experimenters operate their instruments first, and learn about them afterward, they generally remain ignorant of the simple factors of design, the familiarity with which makes wireless work infinitely more interesting. If stations incorrectly designed, or just put together, would not work, this condition would be rectified, although radio might be less popular. The essential problems have been stripped of mathematics which are beyond the average experimenter, in order that any one can build apparatus for a given performance. Receiving circuits have been treated at greater length than sending sets, partly because there is more to say about them, and also because of the limitations of practicability in constructing transmitting apparatus at home.
Learn more about the history of technology with these books
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† Available from the LA Public Library