The first stethoscope was carved out of wood, in the shape of a trumpet or funnel.
The first.
Wood
The stethoscope was invented in 1816 by Rene Laennec. They were invented in Necker Enfants Hospital, Paris France. The first stethoscope was made out of wood, and looked like a trumpet.
Stethoscope
The stethoscope was invented in France in 1816 by René-Théophile-Hyacinthe Laennec.
What is a binaurals on a stethoscope
The origins of the stethoscope date back to 1816 in France. French doctor Rene Laennic invented the first device for listening to a subject's chest. His first stethoscope was little more than a tube created out of rolled paper. The first stethoscope was made by Rene’ Laennec in 1816. It was different to todays models as it was monoaural or one earpiece. His discover was actually made of stacked paper rolled into a cylinder shape, but he soon began to manufacture them made from wood. Binaural stethoscopes first appeared in the 1850's or 1860's and eventually developed into what we see today.
Depends : fingers, stethoscope, EKG.
There is a cute description of a stethoscope at Educational Learning Games. It is an ad but the description still works. I found a website that has a description of a stethoscope and has an assignment on making your own stethoscope that seems pretty good. It seems like a pretty good experiment for elementary school students. Check out Making a Stethoscope at OSU.
what did the first telegraph look like?
systolic