Microscope
We know that a microscope is used to maximize microorganisms.
In those days people observed how a blob of water or a bead of glass could make
things look bigger.
In the 13th century glass makers had to make
glass lenses which were used as spectacles to correct poor eyesight. In the 16th
people used lenses to study small letters.
The microscope seemed to be
invented in several places at once. But most historians agree that Zacharias
Jansen made the first microscope, in 1590. He was made a microscope device as
objects magnified nine times and showed rather blurred images.
After the invention of Jansen, Antony van Leeuwenhoek was
making his own primitive microscopes. He makes a microscope with only one lens
but it could magnify up to 200 times. Using this microscope Leeuwenhoek saw bacteria.
Latest technology
Nowadays scientists are using a 3D microscope which is used
to view living cells. Those microscopes are very clear and magnifying extraordinary
level.
Stethoscope
In medicine, the stethoscope was a great invention. It works with
the principle of multi-reflection. The movement of the heart is listening clearly
with the help of a stethoscope. A French doctor Rene-Theophile-Hyacinthe Laennec
was the first physician to realize that a tube would make it easier to listen
to body fluids. a small story behind
the invention of the stethoscope. Laennec was a shy type, once upon a time he examined
a woman who suspected heart problems.
He needed to listen to her heart, but
those days doctors placed his head on the chest, he did not agree to place his
head on the chest of the woman. So he exited from that place and he saw two boys
playing with a wooden pole in the courtyard.
He used that idea in the
listing heartbeats. He rolled a piece of paper into a tube and placed this
against her heart. At the time he was delighted because this rolled piece of paper
could hear so much more clearly than direct listing.
The improved stethoscope was designed in 1855 by an American
doctor George Philip Cammann. The inside of the stethoscope he added a diaphragm
which picked up more sound.
Latest technology
The latest stethoscope is used to hear sounds very clearly. This
cardiology stethoscope includes high-frequency sound at 48 dBA.
Syringe
Syringes are just like pumps. When a syringe is drawn back from its
chamber, it creates a vacuum inside the chamber suddenly, the needle sucks liquid
medicine into the syringe. At the different think when a plunger is pushed down,
liquid is forced out through the needle.
This invention of the syringe had its
origins in the 17th century. Christoper Wren and Robert Boyle invented the syringe. At the same time, Dominique Anel has invented a syringe. Today’s
syringe was invented by Charles Pravaz in the year of 1853. The modern syringes
are made of plastic and used as use and through. The latest syringes have micro-needles which a small patches containing 400 tiny needles.
Latest technology
The latest syringes are made as easy point needles like microneedles and nanoneedles.
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