So, I want to make a small hand-operated electric generator with my kids just to kind of show them how this kind of thing works. I understand the basics, but there are some things I want to do that I ...

3M model 12 “Aztec “ portable thermoelectric generator. Donor’s father worked on the project to design and make this unit at 3M. Printed on front: “3M Company”. Molded on base front: “3M Brand Thermo ...

[This article was first published in Army Sustainment Professional Bulletin, which was then called Army Logistician, volume 2, number 4 (July–August 1970), pages 18–21. The text is reproduced as ...