The Microscope How we look at very small things!

Microscope History  Light Microscope 1590  Dutch spectacle makers, Zaccharias Janssen and his son Hans.  Discovered that nearby objects appeared greatly enlarged when looking through lenses in a tube.  Light Microscope 1590  Dutch spectacle makers, Zaccharias Janssen and his son Hans.  Discovered that nearby objects appeared greatly enlarged when looking through lenses in a tube.

History Continued  Anton van Leeuwenhoek: “ father of microscopy ”  First to see and describe bacteria, yeast plants, the teeming life in a drop of water, and the circulation of blood in capillaries.  Anton van Leeuwenhoek: “ father of microscopy ”  First to see and describe bacteria, yeast plants, the teeming life in a drop of water, and the circulation of blood in capillaries.

Compound Light Microscope  Compound: means we have more than one lens.  Light: because we need light to see something in the scope.  Compound: means we have more than one lens.  Light: because we need light to see something in the scope.

EYE PIECE HIGH-POWER STAGE CLIP FINE ADJUSTMENT COARSE ADJUSTMENT ROTATING NOSE PIECE LOW-POWER STAGE DIAPHRAGM LAMP BASE ARM

Microscope Rules  The cost of the microscope: $350-$400  ALWAYS carry the microscope with 2 hands.  Plug the cord into the table on your side.  Always start on low power. (Low power objective has yellow ring.)  The cost of the microscope: $350-$400  ALWAYS carry the microscope with 2 hands.  Plug the cord into the table on your side.  Always start on low power. (Low power objective has yellow ring.)

Rules Continued…  Focus from “bottom to top”.  From low power to high power  Always start with the coarse adjustment.  Fine Adjustment: do not spin the fine adjustment (small knob).  Never turn more than 1/2 a turn either way.  Focus from “bottom to top”.  From low power to high power  Always start with the coarse adjustment.  Fine Adjustment: do not spin the fine adjustment (small knob).  Never turn more than 1/2 a turn either way.

Microscope Rules continued…  NEVER use coarse adjustment when you are on high power.  Do Not touch a lens with your fingers.  Use lens paper to clean lenses.  When you put microscope away:  Turn nose piece to low power lens.  Turn off the light.  Wrap cord around the bottom.  NEVER use coarse adjustment when you are on high power.  Do Not touch a lens with your fingers.  Use lens paper to clean lenses.  When you put microscope away:  Turn nose piece to low power lens.  Turn off the light.  Wrap cord around the bottom.

Rules Continued…  Clean up: wash and dry slides with paper towel.  Wash cover slips, but do not dry, it will scratch the cover slip.  Clean up: wash and dry slides with paper towel.  Wash cover slips, but do not dry, it will scratch the cover slip.

THE END