Emotional maturity is the result of many factors, the principal ones being the experiences of the first few years of the child's life.

In their very first collages, Braque and Picasso draw or paint over and on the affixed paper or cloth, so that certain of the principal features of their subjects as depicted seem to thrust out into real, bas-relief space -- or to be about to do so -- while the rest of the subject remains imbedded in, or flat upon, the surface.

Naming the central ray passing through the entrance pupil the axis of the pencil or principal ray, it can be said: the rays of the pencil intersect, not in one point, but in two focal lines, which can be assumed to be at right angles to the principal ray ; of these, one lies in the plane containing the principal ray and the axis of the system, i. e. in the first principal section or meridional section, and the other at right angles to it, i. e. in the second principal section or sagittal section.

This ray, named by Abbe a principal ray ( not to be confused with the principal rays of the Gaussian theory ), passes through the center of the entrance pupil before the first refraction, and the center of the exit pupil after the last refraction.

Also in that year, she was made one of the visiting physicians of the East London Hospital for Children, becoming the first woman in Britain to be appointed to a medical post, but she found the duties of these two positions to be incompatible with her principal work in her private practice and the dispensary, as well as her role as a new mother, so she resigned from these posts by 1873.

In the United States, under DGA rules, directors receive a minimum of ten weeks after completion of principal photography to prepare their first cut.

The Christian groups first called " gnostic " a branch of Christianity, however Joseph Jacobs and Ludwig Blau ( Jewish Encyclopedia, 1911 ) note that much of the terminology employed is Jewish and note that this " proves at least that the principal elements of gnosticism were derived from Jewish speculation, while it does not preclude the possibility of new wine having been poured into old bottles.

In 1896, Booker T. Washington, the first principal and president of the Tuskegee Institute, invited Carver to head its Agriculture Department.

The " ground state ", i. e. the state of lowest energy, in which the electron is usually found, is the first one, the 1s state ( principal quantum level n

Notice that neither the square root nor the principal square root function is the inverse of x < sup > 2 </ sup > because the first is not single-valued, and the second returns-x when x is negative.

His principal translation embraced the first five books of Averroes ' " intermediate " commentary on Aristotle's Logic, consisting of the Introduction of Porphyry and the four books of Aristotle on the Categories, Interpretation, Syllogism, and Demonstration.

And when Pilate, at the suggestion of the principal men amongst us, condemned him to the cross, those that loved him at the first did not forsake him.

It was to be the first major city of the southern Baltic and, after 1282, a principal trading centre in the Hanseatic League.

It was the first permanent international organization whose principal mission was to maintain world peace.

The first are laterites where the principal ore minerals are nickeliferous limonite: ( Fe, Ni ) O ( OH ) and garnierite ( a hydrous nickel silicate ): ( Ni, Mg )< sub > 3 </ sub > Si < sub > 2 </ sub > O < sub > 5 </ sub >( OH )< sub > 4 </ sub >.

The violins are divided into two groups, first violin and second violin, each with its principal.

The principal first violin is called the concertmaster ( or " leader " in the UK ) and is considered the leader of not only the string section, but of the entire orchestra, subordinate only to the conductor.

Most sections also have an assistant principal ( or co-principal or associate principal ), or in the case of the first violins, an assistant concertmaster, who often plays a tutti part in addition to replacing the principal in his or her absence.

But her prettiness was what he had noticed first, and all the other things had come afterward: cruelty, meanness, self-will.

There was an artificial lake just out of sight in the first stand of trees, fed by a half dozen springs that popped out of the ground above the hillside orchard.

The first part of the road was steep, but it leveled off after the second bend and curled gradually into the valley.

No one was behind it, but in the rear wall of the office I noticed, for the first time, a door which had been left partially open.

The herd was watered and then thrown onto a broad grass flat which was to be the first night's bedground.

Once again, Tom Horn was the first and most likely suspect, and he was brought in for questioning immediately.

For Matilda, it was the first she had known in many a night.

Even the knowledge that she was losing another boy, as a mother always does when a marriage is made, did not prevent her from having the first carefree, dreamless sleep that she had known since they dropped down the canyon and into Bear Valley, way, way back there when they were crossing those other mountains.

Stevens was grunting over the last empty pocket when Russ abruptly rose and lunged toward Carmer's hat, which had tumbled half-a-dozen feet away when he first fell.

The Indian's arm whipped sidewise -- there was a flash of amber and froth, the crash of the bottle shattering against the side of the first car.

It was her first smile.

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

Hell, I gave him the first decent job he ever had, six, seven -- how many years ago was it, Rob ''??

Miss Langford ( her first name was Evelyn ) was an attractive girl.

School began in August, the hottest part of the year, and for the first few days Miss Langford was very lenient with the children, letting them play a lot and the new ones sort of get acquainted with one another.

It was just as well that the ignorant Dandy enjoyed himself to the hilt that first evening, for the room was to become his prison cell.

`` Bastards '', he would say, `` all I did was put a beat to that Vivaldi stuff, and the first chair clobbered me ''!!

In 1961 the first important legislative victory of the Kennedy Administration came when the principle of national responsibility for local economic distress won out over a `` state's-responsibility '' proposal -- provision was made for payment for unemployment relief by nation-wide taxation rather than by a levy only on those states afflicted with manpower surplus.

The first systematic thinking about this Pandora's box within Pandora's boxes was done four years ago by Fred Ikle, a frail, meek-mannered Swiss-born sociologist.

The smell at first was more surprising than unpleasant.

His collaboration with Washington, begun when he was the general's aide during the Revolution, was resumed when he entered the first Cabinet as Secretary of the Treasury.

With the first of a group of historical novels, The Charles Men ( Karolinerna ), published in 1897-8, he achieved the masterpiece of his career.

The first half of The Charles Men, ending on the climax of the battle of Poltava in 1709, is more dramatically coherent than the second.

the Low Countries, where the Middle Ages were to last for another two centuries and die out only when Charles the Bold of Burgundy met his first defeat in the fields and forests below the walls of Grandson.

Thus the first lines of one of Charles Wesley's hymns are as follows.

Secretary of Defense Robert McNamara, former President of the Ford Motor Company, comes from a generation different from that of Eisenhower's own first Secretary of Defense, Charles Wilson, who had been head of General Motors.

* In 1870 the small City of Ragusa ( Dubrovnik ) became the first small Lifeboat to cross the Atlantic from Cork to Boston with two men crew, John Charles Buckley and Nikola Primorac ( di Costa ), only.

* In 1927, Charles Lindbergh made the first solo non-stop transatlantic flight in an aircraft ( between New York City and Paris ).

Van Vogt's first published SF story, " Black Destroyer " ( Astounding Science Fiction, July 1939 ), was inspired by Voyage of the Beagle by Charles Darwin.

The first major expression of this were the Lambeth Conferences of the communion's bishops, first convened by Archbishop of Canterbury Charles Longley in 1867.

The first actor to portray Hercule Poirot was Charles Laughton.

He invented the first perfusion pump with Charles A. Lindbergh opening the way to organ transplantation.

* 1521 – Martin Luther's first appearance before the Diet of Worms to be examined by the Holy Roman Emperor Charles V and the other estates of the empire.

Common meter hymns were interchangeable with a variety of tunes ; more than twenty musical settings of " Amazing Grace " circulated with varying popularity until 1835 when William Walker assigned Newton's words to a traditional song named " New Britain ", which was itself an amalgamation of two melodies (" Gallaher " and " St. Mary ") first published in the Columbian Harmony by Charles H. Spilman and Benjamin Shaw ( Cincinnati, 1829 ).

Rather than face this ordeal, Alexei fled to Vienna and placed himself under the protection of his brother-in-law, the emperor Charles VI, who sent him for safety first to the Tirolean fortress of Ehrenberg ( near Reutte ), and finally to the castle of Sant ' Elmo at Naples.

King Charles II, who founded the Royal Observatory Greenwich in 1675 instructed the first Astronomer Royal John Flamsteed, ".

* 1858 – The Eiger in the Bernese Alps is ascended for the first time by Charles Barrington accompanied by Christian Almer and Peter Bohren.

* 1892 – Charles Duryea claims to have driven the first automobile in the United States, in Springfield, Massachusetts.

Charles Grob directed the first major study of the effects of ayahuasca on humans with the Hoasca Project in 1993.

The first European-American settler, Tenney Peabody, arrived in 1833 along with his brother-in-law Charles Blanchard, and a young man named Clark Dowling.

Charles peacefully went into his involuntary retirement, but not without first chastising his nephew for his treachery and asking only for a few royal villas in Swabia, which Arnulf mercifully granted him, on which to live out his final months.

* 1925 – The Great Gatsby by F. Scott Fitzgerald is first published in New York City, by Charles Scribner's Sons.

Wind tunnels were key in the development and validation of the laws of aerodynamics. In 1889, Charles Renard, a French aeronautical engineer, became the first person to reasonably predict the power needed for sustained flight.

The song was first copyrighted in 1835 by the Boston-based music publisher Charles Bradlee, and given the title " The A. B. C., a German air with variations for the flute with an easy accompaniment for the piano forte ".

The first British production of the play in its regular form opened on 7 June 1889 at the Novelty Theatre, starring Janet Achurch as Nora and Charles Carrington as Torvald.