When light acts from above the upper halfof the pulvinus undergoes contraction, resulting in erection of the motile leaf or leaflets.
Series of up-responses of Mimosa leaf to light applied on upper half of pulvinus.
This is clearly seen in the record (upper half of the figure) taken 20 minutes after stimulation, where the curve is far more erect than that of the normal rate of growth before stimulation.
Cylinders are bolted to crank-case with chrome nickel steel studs and nuts which securely lock cylinder to upper half of crank-case.
The arms by which the motor is supported in the fuselage are substantial-ribbed members cast integrally with the upper half.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "upper half" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.