46 Measurement Quotes

There is nothing new to be discovered in physics now. All that remains is more and more precise measurement.

There is something silly about grown men and women striving to reduce their vision of themselves and of civilization to bean counting.

Theoretical physicists live in a classical world, looking out into a quantum-mechanical world. The latter we describe only subjectively, in terms of procedures and results in our classical domain.

It has been observed that the height of a man from the crown of the head to the sole of the foot is equal to the distance between the tips of the middle fingers of the two hands when extended in a straight line.

Time is a wealth of change, but the clock in its parody makes it mere change and no wealth.

Every experiment destroys some of the knowledge of the system which was obtained by previous experiments.

There may be few instances in which the superstition that only measurable magnitudes can be important has done positive harm in the economic field: but the present inflation and employment problems are a very serious one.

The concept of 'measurement' becomes so fuzzy on reflection that it is quite surprising to have it appearing in physical theory at the most fundamental level... does not any analysis of measurement require concepts more fundamental than measurement? And should not the fundamental theory be about these more fundamental concepts?

Beauty cannot be defined by abscissas and ordinates; neither are circles and ellipses created by their geometrical formulas.

Clocks slay time. Time is dead as long as it is being clicked off by little wheels; only when the clock stops does time come to life.

Reality, at first glance, is a simple thing: the television speaking to you now is real. Your body sunk into that chair in the approach to midnight, a clock ticking at the threshold of awareness. All the endless detail of a solid and material world surrounding you. These things exist. They can be measured with a yardstick, a voltammeter, a weighing scale. These things are real.

There's no way to know for sure without finding out what a 'kg' is, and my belief, as an American, is that if I have to start understanding the metric system, then the terrorists have won.

Thus the metric system did not really catch on in the States, unless you count the increasing popularity of the nine-millimeter bullet.

A hundred objective measurements didn't sum the worth of a garden; only the delight of its users did that. Only the use made it mean something.

I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the stage of science, whatever the matter may be.

The more precise the measurement of position, the more imprecise the measurement of momentum, and vice versa. In the most extreme case, absolute precision of one variable would entail absolute imprecision regarding the other.

[Gross national product] measures everything, in short, except that which makes life worthwhile.

I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the stage of science, whatever the matter may be.

Measuring the Absolute: William Thomson and Temperature (2002) by Hasok Chang and Sang Wook Yi (PDF file)

The greatness of an estate, in bulk and territory, doth fall under measure; and the greatness of finances and revenue, doth fall under computation. The population may appear by musters; and the number and greatness of cities and towns by cards and maps. But yet there is not any thing amongst civil affairs more subject to error, than the right valuation and true judgment concerning the power and forces of an estate.

The way is infinitely long, nothing of it can be subtracted, nothing can be added, and yet everyone applies his own childish yardstick to it. 'Certainly, this yard of the way you still have to go, too, and it will be accounted unto you.'

Unlike the position that exists in the physical sciences, in economics and other disciplines that deal with essentially complex phenomena, the aspects of the events to be accounted for about which we can get quantitative data are necessarily limited and may not include the important ones. While in the physical sciences it is generally assumed, probably with good reason, that any important factor which determines the observed events will itself be directly observable and measurable, in the study of such complex phenomena as the market, which depend on the actions of many individuals, all the circumstances which will determine the outcome of a process, for reasons which I shall explain later, will hardly ever be fully known or measurable.

While in the physical sciences the investigator will be able to measure what, on the basis of a prima facie theory, he thinks important, in the social sciences often that is treated as important which happens to be accessible to measurement. This is sometimes carried to the point where it is demanded that our theories must be formulated in such terms that they refer only to measurable magnitudes.

There are two pips in a beaut, four beauts in a lulu, eight lulus in a doozy, and sixteen doozies in a humdinger. No one seems to know how many humdingers there are in a lollapalooza.

MacUser: If you could change one thing, what would it be? Jef Raskin: To not have people assume you can rank every-thing one dimensionally. Or have everybody realise that killing people is not a way to solve problems.

Measuring the Absolute: William Thomson and Temperature (2002) by Hasok Chang and Sang Wook Yi (PDF file)

Maybe that is our mistake: maybe there are no particle positions and velocities, but only waves. It is just that we try to fit the waves to our preconceived ideas of positions and velocities.The resulting mismatch is the cause of the apparent unpredictability.

...a detailed mathematical discussion shows that whatever kind of wave-packet we select to represent the electron, the product of the two uncertainties of position and momentum can never be less than h, which is precisely what Heisenberg found...

Gould's argument on reification purports to get at the philosophical foundation of the field. He claims that general intelligence, defined as the factor common to different cognitive abilities, is merely a mathematical abstraction; hence if we consider it a measurable attribute we are reifying it, falsely converting an abstraction into an 'entity' or a 'thing'-variously referred to as 'a hard, quantifiable thing,' 'a quantifiable fundamental particle,' 'a thing in the most direct, material sense.' Here he has dug himself a deep hole.: Indeed, this whole argument is fantastic. The scientist does not measure 'material things': He measures properties (such as length or mass), sometimes of a single 'thing' (however defined), and sometimes of an organized collection of things, such as a machine, a biological organ, or an organism. In a particularly complex collection, the brain, some properties (i.e., specific functions) have been traced to narrowly-localized regions (such as the sensory or motor nuclei connected to particular parts of the body).

There is nothing new to be discovered in physics now. All that remains is more and more precise measurement.

[Gross national product] measures everything, in short, except that which makes life worthwhile.

Our gross national product does not allow for the health of our children, the quality of their education, or the joy of their play. It does not include the beauty of our poetry or the strength of our marriages, the intelligence of our public debate or the integrity of our public officials. It measures neither our wit nor our courage, neither our wisdom nor our learning, neither our compassion nor our devotion to our country; it measures everything, in short, except that which makes life worth while. And it can tell us everything about America except why we are proud that we are Americans. (University of Kansas, 3-18-67)

Think, for a moment, of a cheetah, a sleek, beautiful animal, one of the fastest on earth, which roams freely on the savannas of Africa. In its natural habitat, it is a magnificent animal, almost a work of art, unsurpassed in speedor grace by any other animal. Now, think of a cheetah that has been captured and thrown into a miserable cage in a zoo. It has lost its original grace and beauty, and is put on display for our amusement. We see only the broken spirit of the cheetah in the cage, not its original power and elegance. The cheetah can be compared to the laws of physics, which are beautiful in their natural setting. The natural habitat of the laws of physics is higher-dimensional space-time. However, we can only measure the laws of physics when they have been broken and placed on display in a cage, which is our three-dimensional laboratory. We can only see the cheetah when its grace and beauty have been stripped away.

The best measure of a man's honesty isn't his income tax return. It's the zero adjust on his bathroom scale.

Never mind what two tons refers to. What is it? How has it entered in so definite a way into our exprerience? Two tons is the reading of the pointer when the elephant was placed on a weighing machine. Let us pass on. ... And so we see that the poetry fades out of the problem, and by the time the serious application of exact science begins we are left only with pointer readings.

Synergy is the only word in our language which identifies the meaning for which it stands. Since the word is unknown to the average public, as I have already pointed out, it is not at all surprising that synergy has not been included in the economic accounting of our wealth transactions or in assessing our common wealth capabilities.

The end is low, like all quantitative ends, personal or not, and it can be attained and verified.

It is indeed a matter of great difficulty to discover, and effectually to distinguish, the true motions of particular bodies from the apparent; because the parts of that immovable space, in which those motions are performed, do by no means come under the observation of our senses. Yet the thing is not altogether desperate; for we have some arguments to guide us, partly from the apparent motions, which are the differences of the true motions; partly from the forces, which are the causes and effects of the true motions.

If it can't be expressed in figures, it is not science; it is opinion. It has long been known that one horse can run faster than another - but which one? Differences are crucial.

It now remains that we find the amount of time of descent through the channel. This we shall obtain from the marvelous property of the pendulum, which is that it makes all its vibrations, large or small, in equal times. This requires, once and for all, that two or three or four patient and curious friends, having noted a fixed star that stands against some fixed marker, taking a pendulum of any length, shall go counting its vibrations during the whole time of return of the fixed star to its original point, and this will be the number of vibrations in 24 hours. From the number of these we can find the number of vibrations of any other pendulums, longer or shorter, at will, so that if for example those counted by us in 24 hours were 234,567, then taking another shorter pendulum with which one counts 800 vibrations while another counts 150 of the longer pendulum, we already have, by the golden rule, the number of vibrations for the whole time of 24 hours; and if we want to know the time of descent through the channel, we can easily find not only the minutes, seconds, and sixtieths of seconds, but beyond that as we please. It is true that we can pass a more exact measure by having observed the flow of water through a thin passage, for by collecting this and having weighed what passes in one minute, for example, then by weighing what passes in the time of descent through the channel we can find the most exact measure and quantity of this time, especially by making use of a balance so precise as to weigh one sixtieth of a grain.