The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 120
sumer to ascertain the quantity of gas used with ease and certainty. Thecomplexity of the old method, which consists of 3 dials with the movementsof the hands or pointers, has been the occasion of very frequent mistakes andmisunderstandings, even with the inspectors, and amongst the consumers…
Architecture · Civil engineering · Science
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