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Figure 1 : Air tractor of James Young Simpson. The markings left by the original inner metal cup can be seen on the inner surface ofthe outer vulcanized rubber cup
(Picture courtesy of Philip Myerscough from a negative supplied by Robert Fraser) [3]


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Figure 2 : Ventouse de Malmström
Ventouse de Malmström
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Figure 3 : Ventouse obstétricale de Malmström
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Figure 4 : Ventouse Minicup Collin, Gentile, Drapier
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Figure 5 : Ventouse de Bird