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Bulk 'Carbon' resistors are rarely used these days. They had a bad habit of catching fire when overloaded. They were also quite unstable, temperature wise. They can be identified in antique circuits by their smooth cylindrical shape. They do not have the 'lumps' at each end that the modern ones do. (We used them as Temperature Sensors in Low Temp Physics labs 'back in the day'.)
I make gallons of this stuff each summer for Hummingbird Food. Just dilute it again 50/50 before loading the feeders. (So it ends up being diluted 4:1):-)
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