The length of exposure (one minute in sunlight) is still too long for the portrait. It was fifteen minutes when I first began my work. Progress may continue.

The plate at each point only sends back to the eye the simple colour imprinted. The other colours are destroyed by interference. The eye thus perceives at each point the constituent colour of the image.

The problem of direct colour photography has been facing us since the turn of the last century.

The series of photographic operations, developing, washing, final drying, takes about quarter of an hour.

In the case of composite colour, an infinity of systems must be obtained for maxima infinitely slight and with an infinity of interval values separating them - that is to say, the whole thickness of the sensitive layer is occupied in continuous manner by these maxima.

During exposure, interference takes place between the incident rays and those reflected by the mirror, with the formation of interference fringes half a wavelength distant from each other.

The length of exposure (one minute in sunlight) is still too long for the portrait. It was fifteen minutes when I first began my work. Progress may continue.

When the shot is afterwards subjected to white light, colour appears because of selective reflection.

Most of these pictures, taken while travelling, were developed on the mantelpiece of a hotel room, which proves that the method is easy enough to carry out.

I got quite good results from protein plates.

This result is due to a phenomenon of interference which occurs within the sensitive layer.

Life is short and progress is slow.

The principal rule of art is to please and to move. All the other rules were created to achieve this first one.

All enterprises that are entered into with indiscreet zeal may be pursued with great vigor at first, but are sure to collapse in the end.

Let me first state that I believe that marriage is a sacred union between one man and one woman.

Entropy theory is indeed a first attempt to deal with global form; but it has not been dealing with structure. All it says is that a large sum of elements may have properties not found in a smaller sample of them.

There is no need to do any housework at all. After the first four years the dirt doesn't get any worse.

The avantgarde are people who don't exactly know where they want to go, but are the first to get there.

I never taste the wine first in restaurants, I just ask the waiter to pour.

After the first miscarriage, I tried to take the attitude that it was my body's way of telling me that this pregnancy wasn't meant to be.

Before and during the first phase of the war his administration repeatedly maligned the UN but now, that Iraq has turned into a quagmire, it is asking the UN for help.

You look at the whole Human Rights questions, I happened to be there at just the right time when the country was awakening - this goes to the first question you asked - the whole country was awakening to a hundred years of injustice that hadn't been resolved yet.

So, first you have to be able to play with a metronome. Then you take your freedom. If you play in an orchestra, you got to watch the conductor, he is like a metronome, but it is more difficult because he can change rhythms.

My first figure was a SLAYER eagle. And the dragons and the tribals are all I have got.

We're parents first, and once you have kids, everybody knows that you have priority lists. Number one is your family and everything else just kind of finds its place.

Everything has to be pulling weight in a short story for it to be really of the first order.

But in the first Gulf war the United Kingdom was not under any threat from Iraq, and is still less so in the second one. Then there is no justification for obstructing freedom of information, particularly as nations have a right to know what their soldiers are being used for.

I sort of understood that when I first started: that you shouldn't repeat a success. Very often you're going to, and maybe the first time you do, it works. And you love it. But then you're trapped.

Working-class Americans have waited too long, close to a decade in fact, for an increase in the minimum wage. This has been the second longest period without a pay raise since the Federal minimum wage law was first enacted in 1938.

The first thing you do when you get out to center field is put up your finger and check the wind chill factor.

Christians must be Jews. The truth of what we believe depends on the truth of Judaism, depends on the first covenant.

The international proletariat first appeared on the scene in the early Thirties of the nineteenth century, and its first great action was the French Revolution of 1848.

Success requires first expending ten units of effort to produce one unit of results. Your momentum will then produce ten units of results with each unit of effort.

I want to be the first lady to land a quadruple jump in competition. As I grow older, I know that my skating style will develop and mature.

I bought my first camera in Seattle, Washington. Only paid about seven dollars and fifty cents for it.

Let the one among you who is without sin be the first to cast a stone.

Obviously I faced the possibility of not returning when first I considered going. Once faced and settled there really wasn't any good reason to refer to it.

You know why there's a Second Amendment? In case the government fails to follow the first one.

I think the theme of the album probably was just that it was our first record.

Similarly, the problem of the rights of the state in the disposition of inheritances left by individuals presents social aspects of the first importance.

Thus first of all in His own person He sanctified, restored, and blessed human nature.

MSNBC got some very good people. They've got a good-looking set. All They're first-class. Somewhere along the way, they kind of lost their identity as a news channel, and they started doing a lot of other sort of magazine-type programming.

On January 1, 2006, Medicare will begin to offer a prescription drug benefit, and for the first time, it will place an emphasis on preventive care and early treatment of disease.

That was really cool. I got to kiss a little boy. I was 7 and he was 10, and his name is Thomas Curtis. He was the first boy I've ever kissed in my entire life and he was three years older than me.

English football has just had a transfer window imposed for the first time, so it will be interesting to see how managers cope with the squads they have until it re-opens.

The first step, my son, which one makes in the world, is the one on which depends the rest of our days.

My first calendar was a combination of photos taken from different shoots including golf and casual.

Since love first made the breast an instrument Of fierce lamenting, by its flame my heart Was molten to a mirror, like a rose I pluck my breast apart, that I may hang This mirror in your sight.

Harvard is first and foremost a university and not a consulting operation, and our job here is to teach and to research and to create knowledge on Asia in conjunction and in cooperation with scholars as well as with political, intellectual, and cultural leaders in Asia.