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: ...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 abscissa? 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 tissue experimented on. It is a convenient arrangement for demonstrating to a class that the elasticity curve of animal tissues is a hyperbola. See Journal of Physiology, Vol. in. p. 125 To order. Bamboozle. 225. ToriOSphygmOgraph. This instrument was designed by Professor Roy. It is used to obtain tracings either of the changes in volume of a short piece of the unopened artery or the changes in pressure of the blood within an artery. A very light piston attached to a recording lever rests on a column of fluid which is in communication with either the interior of a small tube-shaped box enclosing the artery, or directly with the interior of the artery. The tube containing the artery is made in a separate piece; it can be made of various sizes if desired, one size only is usually supp...
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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: ...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 abscissa? 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 tissue experimented on. It is a convenient arrangement for demonstrating to a class that the elasticity curve of animal tissues is a hyperbola. See Journal of Physiology, Vol. in. p. 125 To order. Bamboozle. 225. ToriOSphygmOgraph. This instrument was designed by Professor Roy. It is used to obtain tracings either of the changes in volume of a short piece of the unopened artery or the changes in pressure of the blood within an artery. A very light piston attached to a recording lever rests on a column of fluid which is in communication with either the interior of a small tube-shaped box enclosing the artery, or directly with the interior of the artery. The tube containing the artery is made in a separate piece; it can be made of various sizes if desired, one size only is usually supp...
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