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- Second Career
- Their days are numbered
- Only the Sensor
- Train control mechanism
- Rarest of the Rare?? & Classy 3400 Class
- Control Mechanism
- Those standpipes
- Wrenches
- International D-40 I believe
- Job prospects
- You had me at Train
- Land of the free
- Broad-Exchange Bldg
- Parking innovation
- The old block
- "Peck turned a sweet propeller"
- National Bank Building
- Notch shot
- Straight ahead (right, left, left, right)
- Ship lifespans
- New service
- You Say Station, I Say Potato ...
- Iron Age
- Thank you, Cornelius Vanderbilt
- Grand Central Terminal
- If they made a movie of it
- Obsolete by then.
- Half the tonnage at the NYPANO dock
- Ravages escaped, bank notes signed and dated
- Chatham expansion
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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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