X-rays and their uses. X-rays are one type of electromagnetic radiation. They are commonly used in hospitals to produce photographs of bones which can be checked for breaks or fractures. X-rays have the following properties: they can penetrate less dense matter such as skin and body tissue (but not bone)
The historic Glensheen Mansion, along London Road in Duluth MN, was built for Chester Congdon and his family. Chester Congdon went from being a school teacher in Wisconsin to being the wealthiest Minnesotan at the time of his death in 1916, worth 40 million dollars.
We should take this with a grain of salt. Morganâs estate was valued at around $68.3 million, which would be worth $1.4 billion today, adjusted for inflation, or $25.2 billion, adjusted for share of GDP. In 2007, Michael Klepper and Robert Gunther estimated Morganâs wealth to be $38 billion, adjusted for share of GDP. (For more, see: The Giants of Finance: Andrew Carnegie.) While that would qualify him as wealthy by almost anyoneâs standards, Carnegie had a point. Morgan amassed only a fraction of the wealth of some of his Gilded Age peers.