It is not possible by hand to reverse the current with sufficient rapidity and precision to insure uninterrupted rotation; moreover, the physical exertion of such frequent reversals is considerable.
Proper reversals of the current are accompanied by continuous motion, and since the disk and shaft rotate with the coil, there is continuous rotation.
This signal will be 10 reversals of 1 minute each--the first current giving a deflection the opposite side to the first current of the ordinary signals.
Galvanometer to arrest shore attention, and when joined, give the call as in paragraph 9: the ordinary signals will be 5 reversals of 2 minutes each.
The ordinary signal will be 5 reversalsof 2 minutes' duration, commencing C to E.
Should ship receive weak or defective signals, or bad time kept, notice will be given by sending 2 reversals of 5 minutes each, commencing the opposite side to the ordinary signals.
Should ship desire to open communication by special speaking instruments, notice will be received by a signal of 8 reversals (giving a deflection the opposite to the ordinary signals) of 1/4 minute's duration.
Diversions and reversals of drainage, which are so characteristic of the work of continental glaciers, are hardly less common to glaciated mountain districts.
The number of ways in which the four pigs may be placed in the thirty-six sties in accordance with the conditions is seventeen, including the example that I gave, not counting the reversals and reflections of these arrangements as different.
As I had myself only recorded seventeen, I examined the matter again, and found that he was in error, and, doubtless, had mistaken reversals for different arrangements.
By applying Fleming's rule, as the inductors progress under the poles, the directions and reversals of current are easily determined, as indicated by the sine curves.
In some systems of distribution, instead of the two main conductors being one positive and the other negative, each is positive and negative alternately, the reversals taking place some hundreds of times per second.
When such reversals do not take place, the currents are said to be “direct.
The reversals of motive and fortune, the recognitions and the denouement are as excellently and puerilely absurd as could be desired of such an amalgam of romance and farcical intrigue.
Secretary Seward approved it and yet questioned the expediency of its issue at that stage of the war, owing to the depression of the public mind and the repeated reversals for the Union armies.
The general tendency of these changes is toward complexity and diversity, thus producing progression, but they are subject to frequent reversals which give rise to oscillations lasting millions of years.
Whatever their course in the instances cited and in many others, reversals in the processes of development do take place.
The development of a fragment of an egg as a complete whole involves reversals in the processes of differentiation of a very subtle order.
Favre with regard to the overthrows, reversals and duplication of the strata.
Again, the contrast between Lazarus and Dives in the future state pictures vividly the reversals that are in store; but it is unreasonable to take it as implying that every poor man, whatever his moral character, will be blessed.
The phenomena of animal life are more or less complicated reversals of these processes of reduction.
How many ways there are if mere reversals and reflections are not counted as different has not yet been determined; it is a difficult problem.
These twelve produce ninety-two ways if we regard reversals and reflections as different.
But if one of the eight stars had not already been placed as shown, there would then have been eight ways of arranging the stars according to this scheme, if we count reversals and reflections as different.
Reversals and reflections are here counted as different.
The division is by 4 and not by 8, because we provided against half the reversals and reflections by always reserving one number for the upright and the other for the horizontal.
Mere reversals and reflections must not be counted as different.
It is hardly necessary to say that every one of these squares will produce seven others by mere reversals and reflections, which we do not count as different.
If you will look at the lettered square you will understand that there are only ten really differently placed squares on a chessboard--those enclosed by a dark line--all the others are mere reversals or reflections.
It was understood that reversals and reflections do not count as different.
Mere reversals and reflections will not count as different.
Now, all the other eleven solutions are non-symmetrical, and therefore each of them may be presented in eight ways by these reversals and reflections.
By a system of reversals slight faults in the adjustment of the instrument can be eliminated as in the case of the dip circle.
These reversals of voltage set up stronger and ever stronger oscillations in the plate circuit as before explained.
In the operation of a transformer the alternating current causes the core to undergo rapid reversals of magnetism.
The reason for this is as follows: The current flowing in the primary winding causes repeated reversals of magnetic flux through the iron core.
The iron will now be removed, but the spirals left in the same position as before, and by increasing the speed of the reversals you see a higher deflection is given on the galvanometer.
The one marked A is so connected that reversals at any desired speed per minute from a battery of one or more cells can be passed through it.
This rotation is continued and maintained by the reversals of the current in coils D D, which change alternately the polarity of the field-cores A A.
These are: Increased cost and diminished efficiency of the generator; more waste of energy in heating the cores, and also diminished output of the transformer, since the core is not properly utilized, the reversals being too rapid.
It is obvious that if the four reversals in the same order could be produced by each half-revolution of the generator the motor would make two revolutions to the generator's one.
There would be no deflection of the pointer owing to the rapid reversals of the alternating current.
In his Reversals of the Situation, however, he shows a marvellous skill in the effort to hit the popular taste,--to produce a tragic effect that satisfies the moral sense.
The parts also, with the exception of song and spectacle, are the same; for it requires Reversals of the Situation, Recognitions, and Scenes of Suffering.
But continuous record obtained with my recorder attached to the upper part of the trunk shows that the tree was never at rest, but in a state of continuous movement, which underwent periodic reversals (Fig.
This is secured by causing rapid reversals of the primary current by means of a rotating commutator.
The Christian field of action being a world of grace enveloping the world of nature, many transitory reversals of acknowledged values may take place in its code.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "reversals" in a variety of sentences. We hope that you will now be able to make sentences using this word.
