Bauhaus-Universität Weimar

Titel:
Physiological Instruments
Person:
The Cambridge Scientific Instrument Company
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit38594/70/
62 
Cambridge Scientific Instrument Co., Ltd. [sec. vi 
220. Do. if fitted with automatic counter to electrically count the beats 
of the heart, see Phil. Tram. Roy. Soc., 1892, Series B, pp. 199—298 ...... 
£20. Os. Od. Ballflower 
219 
\ 
221. Myocardiograph, for the Mammalian Heart. This instrument 
was designed by Professor Eoy and Professor J. G. Adami to obtain tracings of the 
contractions of any part of the mammalian heart wall. It consists of an arrange¬ 
ment for recording the distance between any two points on the heart wall without 
the tracing being affected by the movements of the heart as a whole. See The 
Practitioner of Feb. 1890 .................. £4. 15s. Od. Balloonist. 
222. Knoll’s Polygraph, Cambridge pattern. This apparatus 
is so arranged that two tracings can be taken simultaneously on the same drum. 
It can be used to record simultaneously cardiac impulse and a pulse tracing, or 
respiratory 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
        

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