@article{ref1,
title="Description of twin screw-propellers with adjustable immersion, fitted on canal boats",
journal="Proceedings of the institution of mechanical engineers",
year="1894",
author="Barcroft, Henry",
volume="47",
number="1",
pages="360-380",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0020-3483",
doi="10.1243/PIME_PROC_1894_047_009_02",
url="http://dx.doi.org/10.1243/PIME_PROC_1894_047_009_02"
}