fluorometer

"The recipe calls for a precise measure of baking soda. "

"The drummer emphasized the ands in the song, making the rhythm very clear. "

"The violinist was a master of her instrument."

"a blood sample"

"It looks weaker and weaker, the more I think about it."

"The detective carefully examined the fingerprints to detect the thief. "

"The student used a calculator to solve the math problem. "

"The fluorescents hummed day and night."

"The scientist studied the effects of different types of soil on plant growth. "

"The amount of atmospheric pollution threatens a health crisis."

"By the action of electricity, the water was resolved into its two parts, oxygen and hydrogen."

"The mineral showed a bright green fluorescence under the black light. "