Using Microskop

USING A MICROSCOPE The following are steps in using a microscope. 1.Place the microscope on a flat surface in a well-lighted area. 2.Put the low power objective lens above the hole of the stage. 3.Open the diaphragm fully. 4.Look through the eye piece and adjust the mirror to obtain a bright field of view.

USING A MICROSCOPE 5. Place a slide on the stage and hold it with the clips. 6. Lower the objective lens using the coarse adjustor until it is just above the slide 7. Look through the eye piece and turn the coarse adjustor counter-clockwise until the object in focus 8. If necessary, change to a high power objective lens. 9. Adjust the fine adjustor until a sharp image is obtained. 10.When changing from low-power to high-power objective lens, always be careful to look at the position of the objective lens, to avoid sudden contact between the objective lens and the stage

Here are some symbols for you to know the nature of the substance on which these symbols are displayed.

Some ways for treating the lab wastes that you should follow. What to do with liquid and gas waste. This kind of waste must be dissolved. Add a large amount of water to liquid waste before disposal.

Some ways for treating the lab wastes that you should follow. What to do with paper, wood and flameable materials.

Incinerate or burn this kind of waste.

Some ways for treating the lab wastes that you should follow. What to do with decays of plants and animals Bury them. But make sure you don’t bury them near a water source.

Some ways for treating the lab wastes that you should follow. What to do with solid waste. Collect this kind of waste.

The solid waste should be collected seperately for recycling.

Some ways for treating the lab wastes that you should follow. What to do with dangerous chemicals

Eliminate them by means of chemical reaction, neutralization and dissolution.