The first seems not to go farther southward than the Antilles and the Isthmus of Panama.
In the interior of South America the Spanish conquerors had explored the region of the Andes from the isthmus of Panama to Chile.
The diameter of the isthmus was 0.241 mm., and the electromagnet was excited by a current of 40 amperes.
Thus he came at length to stand on the verge of the Indian Ocean; " gazing upon it," a writer has said, " with as much delight as Balboa, when he crossed the Isthmus of Darien from the Atlantic to the Pacific."
From the isthmus of Kra the peninsula extends south with a general inclination towards the east, the most southerly point being Tanjong Bulus in 1° 162' N.
He also negotiated treaties for the purchase of the Danish West Indies, the Bay of Samana, and for American control of the isthmus of Panama; but these were not ratified by the Senate.
The isthmus on which the town stands (which position has caused it to be likened to Corinth) can be crossed without surmounting any great elevation, and offers a feasible canal route.
The typical peninsula is connected with the mainland by a relatively narrow isthmus; the name is, however, extended to any limb projecting from the trunk of the mainland, even when, as in the Indian peninsula, it is connected by its widest part.
The upper, wide opening of the duct is attached by elastic, peritoneal lamellae to the hinder margin of the left lung; the middle portion of the duct is glandular and thick-walled, for the deposition of the albumen; it is connected by a short, constricted " isthmus " (where the shell-membrane is formed) with a dilated " uterus " in which the egg receives its calcareous shell and eventual pigmentation.
In the 16th century the city was the strongest Spanish fortress in the New World, excepting Cartagena, and gold and silver were brought hither by ship from Peru and were carried across the Isthmus to Chagres, but as Spain's fleets even in the Pacific were more and more often attacked in the 17th century, Panama became less important, though it was still the chief Spanish port on the Pacific. In 1671 the city was destroyed by Henry Morgan, the buccaneer; it was rebuilt in 1673 by Alfonzo Mercado de Villacorta about five miles west of the old site and nearer the roadstead.
The rhomboidal peninsula of the Crimea, connected by only a narrow isthmus with the continent, is occupied by an arid plateau sloping gently N.
East Falkland is almost bisected by two deep fjords, Choiseul and Brenton Sounds, which leave the northern and southern portions connected only by an isthmus a mile and a half wide.
It stands in grounds 4000 acres in extent, which include the White and Black Lochs and the ruins of Castle Kennedy, finely situated on the isthmus between the lakes.
In the course of centuries this mole has been silted up and is now an isthmus half a mile wide.
The Russians had not waited for the formal declaration of war; and on the very day that this was notified by the hanging out of the horse-tails before the Seraglio at Constantinople a Russian army under Marshal Munnich stormed the ancient wall that guarded the isthmus of the Crimea.
In the beginning of the 12th century Greenland got its own bishop, who resided at Garolar, near the present Eskimo station Igoliko, on an isthmus between two fjords, Igaliksfjord (the old Einarsfjord) and Tunugdliarfik (the old Eriksfjord), inside the present colony Julianehaab.
The deep bay of Sale or Sumbawa on the north divides the island into two peninsulas, and the isthmus is further reduced by the narrower Bay of Chempi on the south.
In order to prevent the incursions of '.ht Thracians, a wall was built across its isthmus, which was less than 5 m.
The natural harbour, which, with a depth diminishing from 70 to 30 fathoms, strikes in from the northwest so as to cut the island into two fairly equal portions, with an isthmus not more than 14 m.
An account of their preliminary experiments by what they call the isthmus method was published in 1887 (Proc. Roy.
The sample to be inserted between the magnet poles was prepared in the form of a bobbin resembling an ordinary cotton reel, with a short narrow neck (constituting the " isthmus ") and conical ends.
It is shown in the paper that the greatest possible force which the isthmus method can apply at a point in the axis of the bobbin is F = 11, 137 I, log i n b/a, I, being the saturation value of the magnet pores, a the radius of the neck on which the cones converge, and b the radius of the bases of the cones.
Mag., 1896, 41, 153), working with du Bois's electromagnet and using a modification of the isthmus method, succeeded in pushing the induction B up to 74,200 with H =51,600, the corresponding value of I being 1798, and of only 1.44.
In its original sense it connotes attachment to a larger land-mass by a neck of land (isthmus) narrower than the peninsula itself, but it is often extended to apply to any long promontory, the coast-line of which is markedly longer than the landward boundary.
P. leucilla, one of the best known, has a wide distribution from the isthmus of Panama to Guiana and the valley of the Amazon; but it is one of the most plainly coloured of the family, being black with a white head.
He then extended the city by including within the fortifications the low ground (or at any rate the western portion of the low ground) between Upper Achradina and the island, and making the Agora there 2; at the same time (probably) he was able to shift the position of the crossing to the island by making a new isthmus in the position of the present one, the old mole being broken through so as to afford an outlet from the Little Harbour on the east (Lupus, p. 91).
The isthmus connecting the island with the mainland, which was defended by strong fortifications erected by Charles V.
On the landward side of the new isthmus was the Agora, in which remains of a colonnade of the Roman period have been found.
It is not uncommon in the forests of the isthmus of Panama, and Salvin says (Proc. Zool.
A noteworthy peculiarity in the foreign mail service is that an extra charge of 2 cents for each letter and 1 cent for each post-card is collected when they are sent across the isthmus of Panama.
It is found in Brazil, Guiana and Paraguay, and extends its range to the Rio del Norte, but is rare north of the isthmus of Panama.
In 1557 the Portuguese were permitted to erect factories on the peninsula, and in 1573 the Chinese built across the isthmus the wall which still cuts off the barbarian from the rest of the island.
From its western extremity, on the isthmus of the Akrotiri peninsula, which lies between the Bay of Canea and the Bay of Suda (latitude 35° 31' N., longitude 24° i' E.).
By its vicinity to the watersheds of the Eurotas and Alpheus, and its command over the main roads from Laconia to Argos and the Isthmus, Tegea likewise was brought into conflict with Sparta.
Between this ridge and the offshoots of Geraneia opposite a narrow depression allowed of easy transit across the Isthmus neck.
Above sea-level, which in ancient times was a peninsula, the isthmus on the west having been cut through by Ferdinand I.
Its southern extremity, Calabria, forms a complete peninsula, being united to the mass of Lucania or the Basilicata by an isthmus isthmus 35 m.
Geographically, the peninsula begins at the isthmus of Kra, io° N., at which point it is only between 60 and 70 m.