Chapter VIII. On contact of curves and on evelopes.
Differential Calculus Vol. I, GDML_Books, (1852), p. 398 / Harvested from
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@article{PPN588883468+DMDLOG_0017,
     title = {Chapter VIII. On contact of curves and on evelopes.},
     booktitle = {Differential Calculus Vol. I},
     series = {GDML\_Books},
     publisher = {UP},
     address = {Oxford},
     year = {1852},
     pages = {398},
     url = {http://dml.mathdoc.fr/item/PPN588883468+DMDLOG_0017}
}

 (éd.). Chapter VIII. On contact of curves and on evelopes., dans Differential Calculus Vol. I, GDML_Books,  (1852), p. 398. http://gdmltest.u-ga.fr/item/PPN588883468+DMDLOG_0017/