Observations on the sanatory arrangements of factories with remarks on the present methods of warming and ventilation, and proposals for their improvement - Ritchie, Robert 1795/1871 ([J. Weale [etc., etc.], 1844)
"Abridged from a paper illustrated by drawings, read before the Royal Scottish Society of Arts, March, 1844.". - Goldsmiths'-Kress no. 33953. - OCLC, 18365643. - Reproduction of original from Kress Library of Business and Economics, Harvard University