Edgar landivar
Today we all assume as an indisputable truth that Alexander Graham Bell is the inventor of the telephone, ...
Curiosities
Edgar landivar
They will sound like two science fiction stories, but they are not. These are experiments or devices that, ...
The reader may be surprised to learn that the most numerous animals on the planet are not ...
A few months ago (2013), reading a book on the history of the Ecuadorian railroad, I came across a ...
One of the little known uses for an old tube radio (or ...
In the mid-19th century, the German chemist Justus von Liebig developed a highly nutritious meat concentrate ...
Edgar landivar
A couple of months ago I was passing through the Santiago de Chile airport and while ...
I love collecting old books, and the more technical the better. Treatises of chemistry, anatomy, steam locomotives, ...