 | 1870 - 588 pages
...beginning of tho act of expiration the beam is pierced by a black aperture. The first puff from the lungs abolishes tho illuminated dust and puts a patch...course of the expiration. When the tube is placed below tho beam and moved to and fro, the same smoke-like appearance as that obtained with a flame is observed.... | |
 | Sir Norman Lockyer - 1870 - 684 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 place, and the darknrss continues throughout the entire course of the expiration. When the tube is placed below the... | |
 | John Tyndall - 1871 - 436 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...that obtained with a flame is observed. In short, the cotton-wool, when used in sufficient quantity, and with due care, completely intercepts the floating... | |
 | John Tyndall - 1871 - 438 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...obtained •with a flame is observed. In short, the cotton-wool, when used in sufficient quantity, and with due care, completely intercepts the floating... | |
 | 1871 - 604 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...to and fro, the same smoke-like appearance as that obtains I with a flame is observed. In short, the cotton-wool, when used in sufficient quantity, completely... | |
 | Royal Institution of Great Britain - 1872 - 610 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...same smoke-like appearance as that obtained with a flaino is observed. In short, the cotton wool, when used in sufficient quantity, completely intercepts... | |
 | Royal institution of Great Britain - 1872 - 628 pages
...aperture. The first puff from the lungs abolishes the illuminated dust and puts a patch of darkuess in its place ; and the darkness continues throughout...When the tube is placed below the beam and moved to awl fro, the same smoke-like appearance as that obtained with a flame is observed. In short, the cotton... | |
 | Ray Vaughn Pierce - 1909 - 1028 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...that obtained with a flame is observed. In short, the cotton-wool, when used in sufficient quantity, and with due care, completely intercepts the floating... | |
 | Ray Vaughn Pierce - 1889 - 1058 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...that obtained with a flame is observed. In short, the cotton-wool, when used in sufficient quantity, and with due care, completely intercepts the floating... | |
 | R.V. PIERCE, M.D. - 1889 - 1056 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...obtained -with a flame is observed. In short, the cotton-wool, when used in sufficient quantity, and with due care, completely intercepts the floating... | |
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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... 
