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- Lost in Toyland
- And without gloves
- If I were a blindfolded time traveler
- Smoke Consumer Also Cooks
- Oh that stove!
- Possibly still there?
- What?!?
- $100 Reward
- Freeze Frame
- Texas Flyer wanted
- Just a Year Too Soon
- WWII -- Replacing men with women at the railroad crossing.
- Yes, Icing
- You kids drive me nuts!
- NOT An Easy Job
- I wonder
- Just add window boxes
- Icing Platform?
- Indiana Harbor Belt abides
- Freezing haze
- Corrections (for those who care)
- C&NW at Nelson
- Fallen Flags
- A dangerous job made worse
- Water Stop
- Passenger trains have right of way over freights?
- Coal
- Never ceases to amaze me.
- Still chuggin' (in model form)
- Great shot
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Ready Player One: 1940
November 1940. Ansonia, Connecticut. "Taking a temperature reading in the foundry at the Farrell-Birmingham Corporation." Medium format acetate negative by Jack Delano for the Farm Security Administration. View full size.
Red is Red and Yellow is Yellow
'Red hot' can be defined by what color red. It doesn't matter if it is a piece of steel, or the end of a cigar. Planck's Law goes into it far greater detail than I would want to:
Optical Pyrometer
Today we have infrared, non-contact temperature sensing devices. Back then you used an optical pyrometer where a calibrated filament glowed at a specified temperature on the rheostat setting.
The color was matched visually and then the scale was read off the dial setting. Here is one in use at a wire drawing facility where I worked.
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