Quotables
"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 5443794 | Measuring apparatus This invention relates to apparatus for measuring the concentration of a volatile component in a gas and in particular, but not exclusively, to breath alcohol testing apparatus. In such apparatus 10, a pressure transducer 15 is provided to detect the ambi... | 08/22/1995 |
| 4868545 | Alcohol or drugs breath detecting devices Apparatus for detecting the presence of alcohol in expired breath in the atmosphere, comprising a gas sampler, a detector for the presence of alcohol in a gas sample, an output indicator or recorder coupled to the detector to provide an output signal when... | 09/19/1989 |
