The simplest supposition is that the material composing the obstacle is perfectly conducting, i.e.
New York protested against the Bennington grant in 1749, but the question did not become serious until the chief obstacle to settlement was removed by the conquest of Canada in 1760-61.
From the Caspian to Karachi it is possible to pass without encountering any orographic obstacle greater than the divide which separates the valley of the Hari Rud from the Helmund hamun basin, which may be represented by an altitude of about 4000 ft.
One of the purposes of this restrictive provision was that of creating a national merchant marine, but the disinclination of Brazilians for maritime pursuits has been a serious obstacle to its realization.
An interesting exception to the general rule that full brightness requires the existence of the first zone occurs when the obstacle assumes the form of a small circular disk parallel to the plane of the incident waves.
Independent of special views as to the nature of the aether, at Ieast in its main features; for in the absence of a more complete foundation it is impossible to treat rigorously the mode of action of a solid obstacle such as a screen.
This agitation was directed with particular virulence against the high commissioner, whose recall, it was asserted, would remove the chief obstacle to peace.
This was in part due to the character of the country, which was characterized as one vast military obstacle, and in part to the disorganization which had been steadily growing during the six years of King Thibaw's reign.
To the south the rivulet of the Mance soon forms a formidable obstacle as its bed cuts its way through the sandstone.
Of the Scarpe, facing the obstacle of the Canal du Nord and the Sensee.
He was quite aware that the industrial wealth of the great Flemish communes was financially the mainstay of his power, but their very prosperity made them the chief obstacle to his schemes of unifying into a solid dominion the loose aggregate of states over which he was the ruler.
The Panislamic propaganda was encouraged; the privileges of foreigners in the Ottoman Empire - of ten an obstacle to government - were curtailed; the new railway to the Holy Places was pressed on, and emissaries were sent to distant countries preaching Islam and the caliph's supremacy.
Suddenly on the 14th of January 1858 Napoleons life was attempted by Felice Orsini a Mazzinian Romagnol, who believed that Napoleon was the chief obstacle to the success of the revolution in Italy.
He saw Jews, Saracens, heretics and apostates roaming through Spain unmolested; and in this lax toleration of religious differences he thought he saw the main obstacle to the political union of the Spains, which was the necessity of the hour.
The Whitehall conference of 1655 marks a change in the status of the Jews in England itself, for though no definite results emerged it was clearly defined by the judges that there was no legal obstacle to the return of the Jews.
The legend of ritual murder (q.v.) has been revived, and every obstacle is placed in the way of the free intercourse of Jews with their Christian fellow-citizens.
At that critical hour it was at his own expense that Hunyadi fortified Belgrade, now the sole obstacle between Hungary and destruction, with the sole assistance of the Franciscan friar Giovanni da Capistrano, equipped the fleet and the army which relieved the beleaguered fortress and overthrew Mahommed II.
Every obstacle was opposed to the collection of the taxes which had been voted to put the kingdom in a state of defence.
When light proceeding from a small source falls upon an opaque object, a shadow is cast upon a screen situated behind the obstacle, and this shadow is found to be bordered by alternations of brightness and darkness, known as " diffraction bands."
At first, too, he followed Young in the view that the exterior bands are the result of interference between the direct light and that reflected from the edge of the obstacle, but he soon discovered that the character of the edge - e.g.
We have hitherto supposed that the shadow of a diffracting obstacle is received upon a diffusing screen, or, which comes to nearly the same thing, is observed with an eye-piece.
On the electromagnetic theory, the problem of diffraction becomes definite when the properties of the obstacle are laid down.
The first proposal for a free Rhine was mooted by the French at the congress of Rastatt (1797-1799), but Holland, commanding the mouth of the river, placed every obstacle in the way of the suggestion.
The events of the day indeed clearly indicated that the enemy's underwater devices were an even more serious obstacle to the forcing of the Dardanelles than were the Ottoman batteries.
In modern times many of the convents have been devoted to educational work especially for girls, which is an obstacle to the successful development of a public school system in the country.
As one obstacle after another was surmounted, as one grand division of the work after another became an accomplished fact, the effect upon Parkman's condition seems to have been bracing, and he acquired fresh impetus as he approached the goal.
His relative, noting the lad's passionate addiction to study, solemnly warned him, against indulging such a taste, as likely to prove a fatal obstacle to his success in commercial life.
Thus far the great obstacle has been that pictures painted in accordance with Western canons are not suited to Japanese interiors and do not appeal to the taste of the most renowned Japanese connoisseurs.