Though much more expensive than steel, there are now aluminium alloys available that will not corrode in salt water, and an aluminium boat built to similar load carrying standards could be built lighter than steel.

Though not approved by the US Food and Drug Administration ( FDA ) for use on humans, obsidian is used by some surgeons for scalpel blades, as well-crafted obsidian blades have a cutting edge many times sharper than high-quality steel surgical scalpels, the cutting edge of the blade being only about 3 nanometers thick.

Though this process is no longer commercially used, at the time of its invention it was of enormous industrial importance because it lowered the cost of production steel, leading to steel being widely substituted for cast iron.

Though the Opry allowed electric guitars and steel guitars by World War II, the no-drums / horns restrictions continued.

Though the United States steel making industry has gone through a decline through the last half of the 20th Century, U. S. Steel's Fairfield Works continues to be a major employer, though not in the levels seen around the 1950s.

Though quite tame in comparison to modern steel coasters, it remained popular with park visitors.

Though the blast furnaces were idled in late 2008, Republic announced in December 2011 that they would be building electric arc furnaces to once again make steel in Lorain.

Though a steel mill once operated by U. S. Steel Corporation provided employment in nearby Fairless Hills, many Levittowners have historically commuted by automobile or train to Philadelphia, some to Trenton, still others to more distant locales in as many as four states.

Scranton, as depicted on an 1890 panoramic map Though anthracite coal was being mined in Carbondale to the north and Wilkes-Barre to the south, the industries that precipitated the city's growth were iron and steel.

Though much of the 20 years between the discontinuation of the 1000F and the introduction of the 2000FC was spent designing an improved focal plane shutter, the 2000-series again used corrugated metal foil as material for the shutter curtains, though now titanium replaced the original stainless steel.

Though not natural, steel wool makes excellent tinder and can be started with steel and flint, or a 9 volt battery without difficulty.

Though called " irons ," they are no longer made of iron, as a rule, but instead stainless steel is the metal of choice, due to its strength, though when weight is an issue, such as for a jockey, they may also be made of aluminum.

Though the arms of the swords were beautifully decorated and jeweled, they were most highly prized for the quality of their steel.

Though the Bessemer process was licensed in 1856, nine years of detailed planning and project management were needed before the first steel was produced.

Though Magnetic Signal manufactured a steel pole and cast-iron base for this purpose ( which served as a cabinet for backup batteries and relays ), Pacific Electric often mounted the cantilevers on the wooden poles that supported the overhead catenary providing power for streetcars.

Though forced to surrender the patent in 1619, he continued making iron and steel until his estate was sequestrated during the Civil War, but the works continued in use.

Though initially written off by the British Admiralty as unsalvageable, the recent rises in the price of scrap metal had changed the value of the wrecks to the extent that they would now be profitable to lift, based on Cox's estimates of the quantity of high quality Krupp steel armour alone, before taking into account non ferrous salvage.

Though built of steel, the structure as designed visually mimics the features of a wooden coaster.

Though the leadership of the American Federation of Labor ( AFL ) opposed a strike in the steel industry, 98 % of their union members voted to strike beginning on September 22, 1919.

Though the Bessemer process was licensed in 1856, nine years of detailed planning and project management were needed before the first steel was produced.

Though retaining the live-to-two-track method of recording of the previous two albums, this album found the band branching away from purely electric rock to incorporate acoustic guitar, pedal steel, and Rhodes Piano and Wurlitzer organ into the sonic template.

Though I had a great dread of the island and felt I would never leave it alive, I eagerly wrote down everything she told me about its women.

Though the four boys and two girls, the youngest nineteen years of age, the oldest twenty-four, came from varying backgrounds and had different professional and personal interests, there was surprising agreement among them.

Though it did not become known to the writer for some time, a nucleus group had sprung up within the class.

Though little democracy had ever been practised in this region, and much of it was still ruled by feudalistic means, it was taken for granted that at least the forms of Western democracy would be established in this area and Western capitalism preserved within it.

Though it is not easy to apply the evidence of the Iliad to any specific era, this marvelous product of the epic tradition had certainly taken definitive shape by 750.

Though Bob Carroll seemed to have had his head practically blown off by the exploding grenade, he lived.

Though such works as Coming of Age in Samoa and The Chrysanthemum and the Sword remain popular with the American public, Mead and Benedict never had the impact on the discipline of anthropology that some expected.

Though equipped with limbs and the ability to breathe air, most still had a long tapering body and strong tail.

Though Nobel remained unmarried, his biographers note that he had at least three loves.

Though her personal contact with Alfred Nobel had been brief, she corresponded with him until his death in 1896, and it is believed that she was a major influence in his decision to include a peace prize among those prizes provided in his will.

Though she had taken away Alexander's sword, they feared to set about the deed until she threatened to wake him.

Though he was destined to be a strongly counter-reforming emperor, Alexander had little prospect of succeeding to the throne during the first two decades of his life, as he had an elder brother, Nicolas, who seemed of robust constitution.

Though his party won the governor's race and control of the legislature, Johnson still had to overcome considerable opposition from the conservatives in both parties.

Though most BBS software had been written in BASIC or Pascal ( with some low-level routines written in assembly language ), the C language was starting to gain popularity.

Though associated with the Sassanid Persians and with Mithradates VI Eupator ( who for a time incorporated the city into his empire ), by the late Hellenistic or early Roman period, the star and crescent motif had been associated to some degree with Byzantium.

Though a practicing Christian, he had been born into a Jewish family with origins from Portugal, and had converted at a young age.

Though the merger process was traumatic and the new party suffered a few years of extremely poor poll results, it gradually found much greater electoral success than the Liberal Party had done in the post-war era.

Though the Balkan allies had fought together against the common enemy, that was not enough to overcome their mutual rivalries.

Though Havana, which had become the third-largest city in the Americas, was to enter an era of sustained development and closening ties with North America during this period, the British occupation of the city proved short-lived.

Though Gauss had up to that point been financially supported by his stipend from the Duke, he doubted the security of this arrangement, and also did not believe pure mathematics to be important enough to deserve support.

Though conquerors, the Chaldeans were rapidly and completely assimilated into the dominant Babylonian culture, as the Amorites before them had been, and after the fall of Babylon in 539 BC the term " Chaldean " was no longer used to describe a specific race of people, but rather a " socio-Economic " class, regardless of ethnicity.

Though Chiang had achieved status abroad as a world leader, his government deteriorated as the result of corruption and inflation.

Though fascinated by the narrative elements of some of the pictures, particularly the Biblical themes of the massive paintings of Benjamin West, at this point Beaux had no aspirations of becoming an artist.