in- Mica Ventilators. 4, in the valve, B, traversing the orifices, j and X, and thence To promote ventilation in rooms, a little wind-rose or distinctly perhaps), at the same time the blood globules are enter the cylinder by the aperture, 7. Thecover, C, has two wheel with vanes is often used,… … coarse divisions, the lines of which are ¥, of an inch (,, of a Raphael, of Breslau, makes such ventilators of mica, with a minates in a burner which is constantly lit during the opera- mm.) apart, and place it in your A eye piece, so that its lines narrow metallic outer rim, which is connected…
Internet Archive · Public domain (published before 1931). Free to use for anything.
