At Dolaucothi, these trip-hammers were hydraulic-driven and possibly also at other Roman mining sites, where the large scale use of the hushing and ground sluicing technique meant that large amounts of water were directly available for powering the machines.

Drainage wheel from Rio Tinto minesSequence of wheels found at Rio Tinto At Dolaucothi, a similar discovery was made in 1935 during mining operations, and it included part of a reverse overshot water-wheel which is now in the National Museum of Wales.

At first they were only feathers and dark indistinguishable faces and bodies, hunched over their horses' heads.

At the corroborees, when they get to dancing and sweating, you'll see them rubbing up against a man who's supposed to have a specially good smell.

At the same time, I am aware that my recoil could be interpreted by readers of the tea leaves at the bottom of my psyche as an incestuous sign, since theirs is a science of paradox: if one hates, they say it is because one loves ; ;

At last they concluded that the heavy, full feeling in their stomachs was due to lack of exercise.

At last they saw Calcutta, largest city of Bengal and the Caravan's destination.

At least they hadn't stepped up and asked to see papers in the hated, flat, dialect mispronunciation of Mussolini's home district -- Dogumenti, per favore.

At 2130 hours they had passed through the barbed wire at the point of departure.

`` At home, yes '', they argued.

At the same time he started walking the streets, peering at the people passing or shopping at the stalls, storing up fresh impressions of what they looked like, how they moved.

At one time, to most Americans, unless they were fortunate enough to live near a body of navigable water, boats were considered the sole concern of fishermen, rich people, and the United States Navy.

At the moment, Barco's back was to the road so he didn't see the detectives close in on his convertible which, in their quest for the stolen lap rug, they proceeded to search.

At the beginning of the school year, the new students don't eat the cereal right away, but within a short time they are eating it voraciously.

At a nod of his head they let go, turning to cup their ears against the icy slipstream.

At the point where they ended, another settlement grew up around a chapel built at the boat landing by Father Lucian Galtier in 1840.

At 6 o'clock on the morning of August 12, they were in doubt no longer.

At the same time, there is a good deal of self-congratulation at attending a good college -- they are even inclined to exaggerate its not inconsiderable virtues -- and they express pleasure at the cozy in-group feeling that the college generates.

At the base of the rocky hillside, they left their horses and climbed on foot.

At that time, the people at the bank said they felt that they had the situation in hand.

At first I thought they were relatives of your mother, but it was not so.

At times they would ride frenziedly through the camp, letting the women see their courage, how handsome they were in their regalia.

At first they feed on the yolks of the eggs but as this source of nourishment declines they begin to rasp at the ciliated epithelial cells that line the oviduct.

At these words of sympathy and understanding, Harmony said generously, `` I don't mind setting here along with Gran while you go out and join in the games ''.

At the prearranged time, Greg started the engine and taxied out.

At first, I thought he was out of his head, talking wildly like this.

At noontime, remembering what the teacher had said about maybe playing with the kids, Jack stayed close to the schoolhouse while all the other big boys, except Charles, went off out the road to play ball.

At any rate, three men out of a six-man B-52 crew are required to copy down Wisman's go-to-war message.

At dinner, lunch, or breakfast, the President would call out, `` Supper ''!!

At this, the students let out a yell, knowing full well the actual frontier was beyond the town of Kehl.

At the slope's base coils of concertina stretched out of eye range like a wild tangle of children's hoops, stopped simultaneously, weirdly poised as if awaiting the magic of the child's touch to start them all rolling again.

At the very end, when the audience was silent and breathless, a collection was taken and then slowly everyone filed out.

At that moment the bathroom door flew open and Eugene came out, with his face lathered for shaving, and strode down the hall, tying the sash of his dressing gown as he went.

At the same time, it was unlikely that any businessmen would spend a day in a Christian mission out of mere curiosity.

At the Westminster KC Dog Show in Madison Square Garden, New York on the second day, the Finals of the Junior Class brought out the most competitive competition in the history of this Class.

At once the Jesuit pulls out all the stops.

At the end of the performance, Dave and Max came out into the brilliantly lit foyer among a surge of gowned and tuxedoed first nighters.

At Hilo large numbers of people ran out to inspect the amazing spectacle of the denuded beach.

At the State Department, hard-bitten Russian experts complained that the Capitol was out of its wits.

At least, I want to find out whether she's home yet or not ''.

-- At a gay party in the Kremlin for President Sukarno of Indonesia, Premier Khrushchev pulled out his pockets and said, beaming: `` Look, he took everything I had ''!!

At the same time the President took pains not to rule out an eventual meeting with the Soviet leader.

At the very moment that every attempt is being made to take management out from under the irrationality of anti-trust legislation, a drive is on to abolish collective bargaining under the guise of extending the anti-monopoly laws to unions who want no more than to continue to set wages in the same way that ship operators set freight rates.

At 3:57 a.m., with the plane about twenty minutes out of El Paso, passenger Robert Berry, a San Antonio advertising man, glanced up and saw the man and boy, accompanied by a stewardess, walking up the aisle toward the cockpit.

At one time I became disturbed in the faith in which I had grown up by the apparent inroads being made upon both Old and New Testaments by a `` Higher Criticism '' of the Bible, to refute which I felt the need of a better knowledge of Hebrew and of archaeology, for it seemed to me that to pull out some of the props of our faith was to weaken the entire structure.

He would sit inside the coffee shop and pound a gloved fist upon the table and a girl would hear him and come running, bowing with her running, calling out in her bowing, `` At your service ''.

Those elegant `` At Home '' cards she sent out, now she could wear her pretty clothes again, and had the house all trimmed up, hadn't brought many callers in two whole months.

At the same time that I thought I understood her at long last and pitied her, underneath this knowing had there burned unquenched by my pity a fire of hate, an enduring envy that burst out in that ghastly outcry??