 | Ray Vaughn Pierce - 1889 - 1046 pages
...puff from the lungs abolishes the illuminated dust, and puts a patch of darkness in its place; ind the darkness continues throughout the entire course...appearance as that obtained with, a flame is observed. /// short, the cotton-wool, vhen used in sufficient quantity, and with due care, completely intercepts... | |
 | Eclectic medical society of the state of New York - 1871 - 398 pages
...act of expiration the beam is pierced by a black aperture. The first puff from the lungsabolishes the illuminated dust and puts a patch of darkness in its...fro, the same smokelike appearance as that obtained, is observed. In short, the cotton-wool, when used in sufficient quantity, completely intercepts the... | |
 | 1870 - 612 pages
...of expiration the beam is pierced by a black aperture. The first puff from the lungs abolishes the illuminated dust and puts a patch of darkness in its...is placed below the beam and moved to and fro, the samo smoke-like appearance as that obtained with a flame is observed. In short, the cotton wool, when... | |
 | James Anthony Froude, John Tulloch - 1870 - 874 pages
...of expiration the beam is pierced by a black aperture. The first puff from the lungs abolishes the illuminated dust and puts a patch of darkness in its...throughout the entire course of the expiration. When the tubo is placed below the beam and moved 1370] [March to and fix», the same smoke-like appearance as... | |
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On expiring this air through a glass tube, its freedom from floating matter is at once manifest. From the very beginning of the act of expiration the beam is pierced by a black aperture. The first puff from the lungs abolishes the illuminated dust, and... 
