In a manner that involves or relates to the measurement or analysis of gases with scientific precision.
From gasometrical plus the adverb-forming suffix -ly (Old English -lice). This layered construction shows how scientific language builds complexity through suffixes.
English lets us build incredibly specific scientific adverbs by stacking suffixes—gasometrically tells us not just 'how' something was done (adverb -ly) but using which technical method (gasometric), showing how language evolved to handle scientific precision.
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