Difference between revisions of "Scales off boilers"
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If the water used in the boilers of steam engines is 'hard' (high mineral content, particularly calcium), boiling off the water leaves calcium layers (scales), especially on heating surfaces. This has to be periodically rinsed or scrubbed off. | If the water used in the boilers of steam engines is 'hard' (high mineral content, particularly calcium), boiling off the water leaves calcium layers (scales), especially on heating surfaces. This has to be periodically rinsed or scrubbed off. | ||
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| + | *'''"The scales have fallen from my eyes"'''(Acts 9:18) | ||
Latest revision as of 09:38, 2 July 2018
If the water used in the boilers of steam engines is 'hard' (high mineral content, particularly calcium), boiling off the water leaves calcium layers (scales), especially on heating surfaces. This has to be periodically rinsed or scrubbed off.
- "The scales have fallen from my eyes"(Acts 9:18)
