A pipette or dropper is a laboratory tool commonly used in chemistry, biology and medicine to transport a measured volume of liquid, often as a media dispenser. Pipettes come in several designs for various purposes with differing levels of accuracy and precision, from single piece glass pipettes to more complex adjustable or electronic pipettes. Many pipette types work by creating a partial vacuum above the liquid-holding chamber and selectively releasing this vacuum to draw up and dispense liquid. Measurement accuracy varies greatly depending on the style.
The first simple pipettes were made in glass, such as Pasteur pipettes. Large pipettes continue to be made in glass; others are made in squeezable plastic for situations where an exact volume is not required.
The first micropipette was patented in 1957 by Dr Heinrich Schnitger (Marburg, Germany). The founder of the company Eppendorf, Dr. Heinrich Netheler, inherited the rights and started the commercial production of micropipettes in 1961. The adjustable micropipette is a Wisconsin invention developed through interactions among several people, primarily inventor Warren Gilson and Henry Lardy, a professor of biochemistry at the University of Wisconsin-Madison.
I woke up one morning heard a robin's song.
I asked that robin "Why do you sing?"
"It was a voice whose rhymes are worlds
That made my song for me
How could I not sing?"
I woke up on morning heard a robins song
I asked that robin "Who made your throat?"
"That same hand that flies a million dawns
Made my tiny throat and wrote my songs
How could I not sing?"
I built an arbor and I asked the vine
"How come you grow so tall?"
"If I can make it above the wall
That same hand that holds out hope for all
Will gild me in the morning sky
And though I cannot sing
That hand a gentle wind will bring
And make a rustling lullaby
For milky sleeping babes
How could I not grow?"
I woke up one morning and I asked the sky
"How can you bear such emptiness?"
"For that bright eye that looks out and smiles
And makes my night her day
What would I not bear?"
I woke up one morning and I heard her voice
She called me by my name
What would I not give
To be called her child
What would I not give
To be called her friend
I'm gonna wake up one morning I'm gonna see her face
Smiling down on me
That robin's song and that morning sky
Are all the hope I need
I don't know how and I don't know why
But I'm gonna wake up one morning and I'll see her face
Smiling Down on me
I'm gonna wake up one morning
I'm gonna wake up one morning