Physiological instruments manufactured by the Cambridge Instrument Company, Ltd., Cambridge England - Tapa blanda
Sinopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 Excerpt: ...movements and a pulse tracing, or two pulse tracings. It consists of a drum 10 cm. in diameter driven by clockwork making a revolution in one minute, a time marker beating seconds, two Marey registering tambours, a tambour to be fixed over an artery and an indiarubber bag which can be strapped to the body for studying the respiratory movements, and a sphygmograph. Complete with case £9. Os. Od. Ballater. Prepared paper per roll 9d. Balister. 223. ArteriOgPaph, DrMilne Murray's Design. This instrument records the pulse in an artery which has been neither tied nor opened. The artery passes between two ivory blocks which are pressed together by a spring, and are shewn at the bottom of the engraving. One of these is concave towards the artery and is fixed to a rigid vertical rod; the other is convex and is fixed to the vertical arm of a bell-crank lever. As the pressure in the artery varies, the bell-crank turns about the fulcrum, and a knife edge near the end of its horizontal arm moves up and down. This vertical motion is multiplied by a horizontal writing lever recording on a revolving cylinder. The apparatus is supported by a horizontal rod, shewn to the right in the figure............... £3. 3s. Od. Balkers. 224. Testing Machine for Animal Tissues. This instrument was designed by Professor Roy to investigate the properties of the arterial wall. A curve is obtained in which the abscissae are proportional to the weight applied to stretch the strip of tissue, and the ordinates are proportional to the elongations produced by the weights. The surface on which the curves are recorded is moved by hand or by clockwork and pulls with it a weight which slides along the recording lever, the height of whose point corresponds with the length of the strip of t...
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Reseña del editor
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 Excerpt: ...movements and a pulse tracing, or two pulse tracings. It consists of a drum 10 cm. in diameter driven by clockwork making a revolution in one minute, a time marker beating seconds, two Marey registering tambours, a tambour to be fixed over an artery and an indiarubber bag which can be strapped to the body for studying the respiratory movements, and a sphygmograph. Complete with case £9. Os. Od. Ballater. Prepared paper per roll 9d. Balister. 223. ArteriOgPaph, DrMilne Murray's Design. This instrument records the pulse in an artery which has been neither tied nor opened. The artery passes between two ivory blocks which are pressed together by a spring, and are shewn at the bottom of the engraving. One of these is concave towards the artery and is fixed to a rigid vertical rod; the other is convex and is fixed to the vertical arm of a bell-crank lever. As the pressure in the artery varies, the bell-crank turns about the fulcrum, and a knife edge near the end of its horizontal arm moves up and down. This vertical motion is multiplied by a horizontal writing lever recording on a revolving cylinder. The apparatus is supported by a horizontal rod, shewn to the right in the figure............... £3. 3s. Od. Balkers. 224. Testing Machine for Animal Tissues. This instrument was designed by Professor Roy to investigate the properties of the arterial wall. A curve is obtained in which the abscissae are proportional to the weight applied to stretch the strip of tissue, and the ordinates are proportional to the elongations produced by the weights. The surface on which the curves are recorded is moved by hand or by clockwork and pulls with it a weight which slides along the recording lever, the height of whose point corresponds with the length of the strip of t...
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