Doug DeHaven
https://en.wikipedia.org/wiki/Violet_ray Wiki had a great excerpt on this unique device I linked above. What a history! The...
I have a few rare clear demo bulbs made without the usual phosphor coating, to show how...
What a cool piece of history for the collection, and expandable angled parabolic reflector for a camera...
Enjoy some photos from my private tour of this historic site of a once thriving blast furnace.
I found this old beat up Power distribution block from an old house main panel. This unit...
Here is a 96 image focus stack of a phase differential image I took of a crystal...
Recent addition to the collection is the New old stock Weston 271 Thermometer ( Pyrometer ) This...
Such a rare find this was! An old 1950’s Taxi meter made by Ohmer. This one was...
Visiting Cucumber Falls in the Ohiopyle State Park, Pennsylvania, offers a captivating journey into nature’s splendor. Cascading...
With everything in the world going towards electric, what about the humble writing instrument? I set out...
