For a further discussion founded upon the observations of Q.
Sir William Abney has found that the above law agrees remarkably well with his observations on the transmission of light through water in which particles of mastic are suspended (Prot.
Observations have usually been limited to a portion of the year, or to a few hours of the day, whilst the results from different stations differ much in details.
Observations on mountain tops generally show high potentials near the ground.
Annual Variation.-When observations are made at irregular hours, or at only one or two fixed hours, it is doubtful how representative they are.
From the observations at Trieste in 1902-1903 E.
These include the mutual distances of some of the stars in the Pleiades, a few observations of the apparent diameter of the sun, others of the distance of the moon from neighbouring stars, and a great number of measurements of the diameter of the moon.
It never occurred to me that it might be worth while to make my own observations and describe the experiences peculiarly my own.
The magnetic observations he made during his travels were utilized by C. F.
The observations were usually confined to a few hours of the day, very commonly between II A.M.
According to these observations, two distinct types of so-called tabby cats are recognizable.
In the judgment of D'Alembert the Cartesan theory was the best that the observations of the age admitted; and " its explanation of gravity was one of the most ingenious hypotheses which philosophy ever imagined."
Every once in a while, the half-demon surprised him with the depth of his observations and compassion.
Still, the close relationship of the existing Liberian pigmy hippopotamus to the fossil Mediterranean species is significant, in relation to the foregoing observations on the elephant.
Some of the earliest balloon observations made the gradient increase with the height, but such a result is now regarded as abnormal.
From observations during twelve balloon ascents, Linke concludes that below the 1500-metre level there are numerous sources of disturbance, the gradient at any given height varying much from day to day and hour to hour; but at greater heights there is much more uniformity.
Gockel, have made long series of observations without it.
In the cases where the observations were confined to a few months the representative nature of the results is more doubtful.
May be felt as to the earlier observations there.
Summer Observations On Mountains Have Shown Diurnal Variations Very Large And Fairly Regular, But Widely Different From Those Observed At Lower Levels.
Observations on the Sonnblick agree with those at low-level stations in showing a diminution of dissipation with increase of relative humidity.
Of late years many observations have been made of the ionic charges in air.
Observations between 6 and 7 P.M.
In the island of Juist, off the Friesland coast, from three weeks' observations they obtained only 5.2 as the mean.
On the other hand, at Altjoch, an Alpine station, from nine days' observations in July 1903 they obtained a mean of 137, the maximum being 224, and the minimum 92.
Thunder.-Trustworthy frequency statistics for an individual station are obtainable only from a long series of observations, while if means are taken from a large area places may be included which differ largely amongst themselves.
16' 24" 16' 16" 8 Gascoigne, from his observations, deduces the greatest variation of the apparent diameter of the sun to be 35"; according to the Connaissance des temps it amounts to 32" 3.3 These results prove the enormous advance attained in accuracy by Gascoigne, and his indisputable title to the credit of inventing the micrometer.
It was used by him in his earliest observations of double stars (1779-1783); but, even in his hands, the measurements were comparatively crude, because of the difficulties he had to encounter from the want of a parallactic mounting.
The discordance in zero, when known to exist, is really of no consequence, because the observations can be so arranged as to eliminate it.
In delicate researches two divisions of the scale should always be read, not merely for increased accuracy but to obtain the corrections for " run " from the observations themselves.
Their absolute freedom from diffraction, the perfect control of the illumination and thickness of the lines, and the accuracy with which it will be possible to construct scales for zone observations will be important features of the new method.
In 1526 he was sent out in command of an expedition fitted out for the purpose of determining by astronomical observations the exact line of demarcation, under the treaty of Tordesillas, between the colonizing spheres of Spain and Portugal, and of conveying settlers to the Moluccas.
Nothing more seems to have been known of it in Europe till 1803, when Azara published at Madrid his observations on the birds of Paraguay (Apuntamientos, No.
In 1636 Descartes had resolved to publish some specimens of the fruits of his method, and some general observations on its 7 lb.
According to his observations, in the Egyptian wild cat the pads of the toes are wholly black, while the black extends back either continuously or in long stripes as far as the calcaneum or heel-bone.
The foregoing opinion as to the dual parentage of our domesticated cats receives support from observations made many years ago by E.
61) devised a measuring machine which combines the rapidity of the glass-scale micrometer with the accuracy of the spiderline micrometer and simplifies the reductions of the observations at the same time.
The same observer from four weeks' observations at Hammerfest got the considerably lower mean value 58, with a maximum of 252.