A description of ventilators: whereby great quantities of fresh air may with ease be conveyed into mines, goals, hospitals, ... By Stephen Hales ...
Hales, Stephen,1677-1761.
London : printed for W. Innys; R. Manby; and T. Woodward,
1743.
A continuation was published in 1758 with the title 'A treatise on ventilators'.
Paragraphs numbered 1-236.
ESTC