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is a controlled medical act in which drugs are used to block the tactile and pain sensitivity of a patient, either in all or part of his body and with or without compromise of consciousness.William morton -
any of varius machines fot stitching material, usualy having a needle and shuttle to carry thread and powered by treadle waterpower, or electricity. It was the first wiely distributed mechanical home appliance and was been an important industrial machine
-ELÍAS HOWE- -
is a vertical transportation system, designed to move people or objects between different levels of a builing or structure. It is made of mechanical, electronic parts that work together to set it motion.
- ELISHA OTIS GRAVE -
created to transmit acoustic signalsat a distance by means of electrical signals.
- ANTONIO MEUCCI -
is a human-powered personal transport vehicle. It is propelled by the traveler himself, who drives the veicle with the muscular effort for the legs in the particular by pedaling
- PIERRE MICHAUX - -
it consisted of a glss tube ending in a closehed sphere the open and was imersed upside down in a mixture of alcohol and water while the shpere remained at the top. Wen the liquid was heated, it rose up the tube.
- THOMAS CLIFFORD ALLBUTT- -
is a wheeled motoritzed veicle used for transportation
-KARL BENZ- -
was the first sound recording an reproduction system that used a flat disc, unlike the phonograph that recorded on a cylinder.
-THOMAS ALVA EDISON- -
is a fixed wind airfoil a body alwais powered by one or more engines and capable of fluing
-CLÉMENT ADER- -
it is used as a medicine to treat pain fever and inflamation.
FÉLIX HOFFMAN