Doug DeHaven
Recently added to the collection, is a very rare solid cast aluminum light bulb. This video will...
Collection
Items like this where needed before the prevalence of laser pointers we have today, these are mini...
As my collection expanded in size and diversity, I found it necessary to implement a systematic method...
I recently picked up this broken Monroe LA5-160 Calculator for the collection, it was cheap for it...
Every want to know how a gas pump nozzle works? how it knows when to shut off?...
Recently added to the collection is an old 1970’s Weather Measure Corp, Solar radiation recorder ( Pyranograph...
Just in to the collection is a 1829 Henry Troemner solution scale Model 80-B Almost 200 years...
Found this recently on a bike ride in the woods, any idea what it may be? It...
Worlds first magic marker, predates the sharpie! This marker was designed by Sidney Rosenthal, more on that...
What a cool device, I explain more in detail in the video how something like this works,...
