A more advanced 100 square foot colored concrete patio installation costs homeowners between $713 and $933 on average, which includes $188 to $204 worth of materials and $525 to $728 worth of labor costs.
The Diaphragm or diaphragm control lever regulates the amount of light passing through the slide specimen on the microscope stage.
The coloured part of the eye, or the iris, works in conjunction with the pupil (the black dot in the middle) to control how much light enters the eye. The iris has tiny muscles which enable it to dilate and constrict the pupil to allow more or less light into the eye.