Henrietta was discovering in the process of writing, as the born writer does, not merely a channel for the discharge of accumulated information but a stimulus to the development of the creative powers of observation, insight and intuition.

Following observation of the fact that the reaction rates of supposedly identical reaction mixtures prepared on the same filling manifold and exposed under identical conditions often differed by several hundred per cent, a systematic series of experiments was undertaken to see whether the difficulty could be ascribed to the method of preparing the chlorine, to the effects of oxygen or moisture or to the effect of surface to volume ratio in the reaction tubes.

Milman Parry rigorously defended the observation that the extant Homeric poems are largely formulaic, and was led to postulate that they could be shown entirely formulaic if the complete corpus of Greek epic survived ; ;

This explanation is attractive, but is vitiated at least in part by the observation that Cynewulf, though he used kennings in the traditional manner, was a literate man who four times inscribed his name by runes into his works.

In one such theory, put forward by Sir E. B. Tylor, early humans initially, through mere observation, recognized what might be called a soul, life-force, spirit, breath or animus within themselves ; that which was present in the body in life and absent in death.

The early use of Chinese astrology was mainly confined to political astrology, the observation of unusual phenomena, identification of portents and the selection of auspicious days for events and decisions.

One such star, however, with a right ascension nearly equal to that of γ Draconis, but in the opposite sense, was selected and kept under observation.

Euan MacKie, recognizing that Thom's theories needed to be tested, excavated at the Kintraw standing stone site in Argyllshire in 1970 and 1971 to check whether the latter's prediction of an observation platform on the hill slope above the stone was correct.

However, from ground level, this sunset would be obscured by a ridge in the landscape, and the viewer would need to be raised by two meters: another observation platform was needed.

The wave of arson in the South Bronx in the 1960s and 1970s inspired the observation that " The Bronx is burning ": in 1974 it was the title of both a New York Times editorial and a BBC documentary film.

Hubble's observation was taken to indicate that all very distant galaxies and clusters have an apparent velocity directly away from our vantage point: the farther away, the higher the apparent velocity.

It was kept under covert observation until the incubation period had elapsed but none of the crew fell ill.

Tristanne J. Connolly makes a similar observation, stating that the husband-wife motif reflects marriage as it was understood at the time.

Cranmer's work of simplification and revision was also applied to the Daily Offices, which were to become Morning, and Evening Prayer ; and which he hoped would also serve as a daily form of prayer to be used by the Laity, thus replacing both the late medieval lay observation of the Latin Hours of the Virgin, and its English equivalent, the Primer.

The study concluded that Prahlad Jani was able to survive under observation for two weeks without either food or water, and had passed no urine or stool, with no need for dialysis.

Interviews with the researchers speak of strict observation and relate that round-the-clock observation was ensured by multiple CCTV cameras.

The second law is offered as a simple observation in the same essay ; its status as Clarke's Second Law was conferred on it by others.

This was first suggested by Mereschkowsky in 1905 after an observation by Schimper in 1883 that chloroplasts closely resemble cyanobacteria.

One of his specialities was designing camouflaged armoured trees for use as observation posts ; he was wounded in 1916 helping to set up an observation post.

Comet Shoemaker – Levy 9 ( formally designated D / 1993 F2 ) was a comet that broke apart and collided with Jupiter in July 1994, providing the first direct observation of an extraterrestrial collision of Solar System objects.

There also came a brief contretemps with the sound mixers who made the mistake of being overheard during a quiet moment near the conclusion of `` Do It Again '', and she made the tart observation that `` I never saw so much moving about in an audience ''.

He made use of the time by undertaking far more intensive fieldwork than had been done by British anthropologists, and his classic ethnography, Argonauts of the Western Pacific ( 1922 ) advocated an approach to fieldwork that became standard in the field: getting " the native's point of view " through participant observation.

The characterization is epitomized by an observation made by President Ramón Barros Luco ( 1910 – 1915 ), reputedly made in reference to labor unrest: " There are only two kinds of problems: those that solve themselves and those that can't be solved.

Edouard van Beneden and Theodor Boveri made the first observation and identification of centrioles in 1883 and 1888 respectively, while the pattern of centriole replication was first worked out independently by Etienne de Harven and Joseph G. Gall circa 1950

Joseph von Mering and Oskar Minkowski made the observation in 1889 that removing the pancreas surgically led to an increase in blood sugar, followed by a coma and eventual death — symptoms of diabetes mellitus.

While preparing for an evening lecture on 21 April 1820, Hans Christian Ørsted made a surprising observation.

Singer wrote: " My conclusion there is, and here I back Shklovsky, that if the satellite is indeed spiraling inward as deduced from astronomical observation, then there is little alternative to the hypothesis that it is hollow and therefore martian made.

" The Andalusian astronomer Ibn Bajjah (" Avempace ", d. 1138 ) proposed that the Milky Way was made up of many stars that almost touch one another and appear to be a continuous image due to the effect of refraction from sublunary material, citing his observation of the conjunction of Jupiter and Mars as evidence of this occurring when two objects are near.

In the 10th century, the Persian astronomer, Azophi, made the earliest recorded observation of the Andromeda Galaxy, describing it as a " small cloud ".

The reason for the observation is that in the past, when panes of glass were commonly made by glassblowers, the technique used was to spin molten glass so as to create a round, mostly flat and even plate ( the crown glass process, described above ).

This observation made him one of the first scholars in ancient physics to address the role of time in the universe, one of the most important concepts even in the modern history of physics.

This can be compared to Pausanias ' report that in the Ionaian city of Colophon in Asia Minor a sacrifice of a black female puppy was made to Hecate as " the wayside goddess ", and Plutarch's observation that in Boeotia dogs were killed in purificatory rites.

On 23 April he made his first recorded direct observation of indigenous Australians at Brush Island near Bawley Point, noting in his journal: "... and were so near the Shore as to distinguish several people upon the Sea beach they appear'd to be of a very dark or black Colour but whether this was the real colour of their skins or the Cothes

This observation was first made by the French chemist Joseph Proust, based on several experiments conducted between 1798 and 1804.

Friedrich Meves, in 1904, made the first recorded observation of mitochondria in plants ( Nymphaea alba ).

While anchored in Dungeness Bay on the south shore of the Strait of Juan de Fuca, third lieutenant Joseph Baker made an observation of Mount Baker, which Vancouver recorded in his journal:

However, when an observation is made to determine the actual location or state of the object, it always finds the object in a single state, not a " mixture ".

" This observation was also made by Chrysostom ( 349-407 ) in " Homilia i, in Phil.

According to Josep Puig, the Andalusian astronomer Ibn Bajjah proposed that the Milky Way was made up of many stars which almost touched one another and appeared to be a continuous image due to the effect of refraction from sublunary material, citing his observation of the conjunction of Jupiter and Mars on 500 AH ( 1106 / 1107 AD ) as evidence.

A more recent sunspot observation was made on 17 March 807 AD by the Benedictine monk Adelmus, who observed a large sunspot that was visible for eight days ; however, Adelmus incorrectly concluded he was observing a transit of Mercury.

Measurements made in the latter part of the 2000s and based also on observation of infrared spectral lines, have suggested that sunspot activity may again be disappearing, possibly leading to a new minimum.

The same observation can be made for the perfect matching problem.