Her English vocabulary was growing a word at a time—mostly terms like dust, vacuum, linens, dishes and other domestic terminologies.
He was resigned to quietly reading a book until Mrs. Porter the housekeeper showed up a day early, accommodating a family wedding, and Dean's peace began competing with the sounds of a vacuum cleaner and Mrs. Porter's radio music, even worse junk than Fred's usual selections.
Today, she'd give anything just to have Ashley back, no matter how long it took her to fix the vacuum cleaner after it choked on the beads.
There is no such thing really as a vacuum, any more than there are atoms or ultimate indivisible particles.
The steam is introduced into the pipes at about the pressure of the atmosphere, and is sucked through the system by means of a vacuum pump, which at the same operation frees the pipes from air and from condensation water.
About the same time Davy showed that two pieces of ice could be melted by rubbing them together in a vacuum, although everything surrounding them was at a temperature below the freezing point.
There is this difference, however, between this experiment and the operation imagined by Maxwell, that when the gases have diffused the experiment cannot be repeated; and it is no more contrary to the dissipation of energy than is the fact that work may be derived at the expense of heat when a gas expands into a vacuum, for the working substance is not finally restored to its original condition; while Maxwell's "demons" may operate without limit.
- Telluriumbismuth Vacuum Thermal Detector for Electric Oscillations.
The exhaust steam passing from the engine through the blastpipe and the chimney produces a diminution of pressure, or partial vacuum, in the smoke-box roughly proportional to the weight of steam discharged per unit of time.
The liquid is then evaporated under a vacuum of 27 to 28 in.
Of mercury, and, when of specific gravity 1.295 (corresponding to about 80% of glycerin), it is distilled under a vacuum of 28 to 29 in.
Evaporation and subsequent distillation under a high vacuum gives crude glycerin.
For the production of high vacua, see Vacuum Tube; Liquid Gases.
Obviously in that time, the underlying technology kept shifting—computers went from electromechanical to relays to vacuum tubes to transistors and then to integrated circuits—and the abstraction, the calculations per second, kept doubling.