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 obsidian was also available north of Jackson Hole, virtually all the obsidian spear points found are from a source to the south, indicating that the main seasonal migratory route for the Paleo-Indian was from this direction.

Though he is also concerned with freeing dance from pedestrian modes of activity, Merce Cunningham has selected a very different method for achieving his aim.

Though sex in some form or other enters into all human activity and it was a good thing that Freud emphasized this aspect of human nature, it is fantastic to explain everything in terms of sex.

Though it centers around the brilliant and enigmatic figure of Charles 12,, the true hero is not finally the king himself.

Though versatile and capable of turning out a ballad lyric with the best of them, Mercer's forte is a highly polished quasi-folk wit.

Though creeks in the Santa Cruz mountains flow brimful the year round and it is forever spring, the apples that grow there have a wintry crackle.

Though there is obviously nothing new about these techniques, they do challenge the worker's skill to articulate them precisely on the spot and on the basis of quick and accurate diagnostic assessments.

Though there is obviously great need for continued experimentation with various types of short-term intervention to further efforts in developing an operational definition of prevention at the secondary -- or perhaps, in some instances, primary -- level, the place of short-term intervention has already been documented by a number of investigators in a wide variety of settings.

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 now complete, the publication is included in this directory because of its importance and because of the long-term nature of its preparation.

Though there are many exceptions, which we have noted in preceding pages, white wine is as a rule best consumed between two and six years old, and red wines, nowadays, between three and ten.

Though his character is broader and more comically rounded than the don, he gives it a firmness and toughness -- a sort of peasant dignity -- too.

Though Aristotle wrote many elegant treatises and dialogues ( Cicero described his literary style as " a river of gold "), it is thought that the majority of his writings are now lost and only about one-third of the original works have survived.

Though the prison chaplain accuses the state of stripping Alex of free will, the government officials on the scene are pleased with the results and Alex is released into society.

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 the word atom originally denoted a particle that cannot be cut into smaller particles, in modern scientific usage the atom is composed of various subatomic particles.

Though the ceremony installs the new abbot into a position of legal authority, it does not confer further sacramental authority-it is not a further degree of Holy Orders ( although some abbots have been ordained to the episcopacy ).

Though the title " abbot " is not given in the Western Church to any but actual abbots of monasteries today, the title archimandrite is given to " monastics " ( i. e., celibate ) priests in the East, even when not attached to a monastery, as an honor for service, similar to the title of monsignor in the Western / Latin Rite of the Roman Catholic Church.

Though she is one of the few gods of the Greek Pantheon to be actually married, she is frequently unfaithful to her husband.

Though the are has fallen out of use, the hectare is still commonly used to measure land:

Though their holding-power-to-weight ratio is significantly lower than admiralty pattern anchors, their ease of handling and stowage aboard large ships led to almost universal adoption.

Though some of the masonry in the ruins is certainly pre-Roman, the Suda's identification of it with Cyinda, famous as a treasure city in the wars of Eumenes of Cardia, cannot be accepted in the face of Strabo's express location of Cyinda in western Cilicia.

Though the resolution is historically significant, Hideaki Uemura, professor at Keisen University in Tokyo and a specialist in indigenous peoples ' rights, commented that the motion is " weak in the sense of recognizing historical facts " as the Ainu were " forced " to become Japanese in the first place.

Though Americans usually lived in groups segregated by national origin or religious belief, they liked to work and shop in the noise and vitality of downtown.

Though usually observed in the spring, the date varies, depending on climate and suitable planting season.

Though most of the early Waldorf schools were teacher-founded, the schools today are usually initiated and later supported by an active parent community.

Though a minimum of three bishops participating is desirable ( there are usually several more ) in order to demonstrate collegiality, canonically only one bishop is necessary.

Though the Shang did not have a concept of " medicine " as distinct from other fields, their oracular inscriptions on bones and tortoise shells refer to illnesses that affected the Shang royal family: eye disorders, toothaches, bloated abdomen, etc., which Shang elites usually attributed to curses sent by their ancestors.

Though the office was usually held after the quaestorship and before the praetorship, there are some cases with former praetors serving as aediles.

Though physical confrontations between the two species are usually dominated by the larger wolves, coyotes have been known to attack wolves if they outnumber them.

Though the fiber flow ( local inhomogeneities of the material's chemical composition generated during casting ) doesn ’ t follow the shape of the crankshaft ( which is undesirable ), this is usually not a problem since higher quality steels, which normally are difficult to forge, can be used.

Though this venue usually is reserved for juniors and seniors, Harold Scott insisted that Flockhart perform there in his production of William Inge's Picnic.

Though some Roman patrons ordered marble replicas of the specifically Anatolian " Diana " of Ephesus, where the Temple of Artemis stood, Diana was usually depicted for educated Romans in her Greek guise.

Though nearly all modern mathematicians consider nonconstructive methods just as sound as constructive ones, Euclid's constructive proofs often supplanted fallacious nonconstructive ones — e. g., some of the Pythagoreans ' proofs that involved irrational numbers, which usually required a statement such as " Find the greatest common measure of ..."

Though modern epigrams are usually thought of as very short, Greek literary epigram was not always as short as later examples, and the divide between " epigram " and " elegy " is sometimes indistinct ( they share a characteristic metre, elegiac couplets ); all the same, the origin of the genre in inscription exerted a residual pressure to keep things concise.

Though samples are usually food-related, some laboratories are equipped to analyze drugs, cosmetics, and radiation-emitting devices.

Though the rich usually led fashion, the increasing affluence of early modern Europe led to the bourgeoisie and even peasants following trends at a distance sometimes uncomfortably close for the elites — a factor Braudel regards as one of the main motors of changing fashion.

Though the thorn character ( whose appearance was usually similar to the modern " p ") was most common, the eth could equally be used.

Though " president " and various monarchic titles are most commonly used for heads of state, in some nationalistic regimes ( usually republics ), the leader adopts, formally or de facto, a unique style simply meaning " leader " in the national language, such as Nazi Germany's single party chief and head of state and government, Adolf Hitler Führer ( see that article for equivalents ).

Though states ( or increasingly, international organizations ) are usually the only ones with standing to address a violation of international law, some treaties, such as the International Covenant on Civil and Political Rights have an optional protocol that allows individuals who have had their rights violated by member states to petition the international Human Rights Committee.

Though it previously held a more eurosceptic stance than is usually articulated by most other green parties in Europe, the party backed the Lisbon Treaty with support from two thirds of the party.

Though the composition of a bocadillo varies by region, it is usually a baguette filled with salad and a choice of meats, fish ( usually tuna ), or omelette.

Though moose are usually hunted by packs, there are cases in which single wolves have successfully killed healthy, fully-grown moose.

Though this usually goes unacknowledged, Optimality Theory was strongly influenced by Natural Phonology ; both view phonology in terms of constraints on speakers and their production, though these constraints are formalized in very different ways.

Though his absence from the 1958 conclave did not make him ineligible – under Canon Law any Catholic male may be elected – the College of Cardinals usually chose the new Pope from among themselves.

Though there is no explicit record of this, it is usually assumed that Sappho returned from exile at some point and that she spent most of her life in Lesbos.