Done properly, thermite burns vigorously but not explosively, and you can controllably create a mass of molten steel falling out the bottom of a ceramic cone. This steel can be used to make castings or to weld large pieces of existing steel. For example, high-speed train track is commonly ...
Before I started on this project I built a simpler prototypepenny crusherthat used interchangeable die plates. That allowed me to validate my some fundamental elements of the design. These elements include the sizing and choice of bearings, die design and fabrication, and the ratio of the drive ...
This peculiar coin was minted on the same blanks as US steel pennies (see above), but it was made by the US for use in Belgium during the war. From the eBay description: Here is the greatest anomaly in modern United States coinage history. During World War II, as the Americans advanced...
The Depression caused what is now known as a "liquidity trap", where the price of money is 0% interest and still no demand. GOVERNMENT came in and spent on work projects and then the war...that in turned created demand for goods and services which got up out of the depression: conclus...