Several efforts were made in this direction, and though not all of them survive to this day, the Brown & Sharpe wire gage system was eventually adopted as the American standard and is still in common use today.

Several major North American drainage basins and many minor ones share a common border with the Columbia River's drainage basin.

Several patterns of linking the rings together have been known since ancient times, with the most common being the 4-to-1 pattern ( where each ring is linked with four others ).

Several subspecies of the common chimpanzee have been recognized:

Several clinical and experimental data have implicated the failure of blood – brain barrier ( BBB ) function in triggering chronic or acute seizures, some studies implicate the interactions between a common blood protein — albumin and astrocytes.

Several digraphs are common in English.

Several of the most common techniques for producing glass art include: blowing, kiln-casting, fusing, slumping, pate-de-verre, flame-working, hot-sculpting and cold-working.

Several traditional players have used hammers that differ substantially from those in common use today.

Several common analogies support slippery slope arguments.

Several libertarian socialists, notably Noam Chomsky, believe that anarchism shares much in common with certain variants of Marxism such as the council communism of Marxist Anton Pannekoek.

Several optional extensions are also available, including MIPS-3D which is a simple set of floating-point SIMD instructions dedicated to common 3D tasks, MDMX ( MaDMaX ) which is a more extensive integer SIMD instruction set using the 64-bit floating-point registers, MIPS16e which adds compression to the instruction stream to make programs take up less room, and MIPS MT, which adds multithreading capability.

Several cyanobacterial strains are also capable of diazotrophic growth, an ability which may have been present in their last common ancestor in the Archaean.

Several bands will share a common territory, with some members of one band joining another band, every so often.

Several common forms of SOD exist: they are proteins cofactored with copper and zinc, or manganese, iron, or nickel.

Several fundamental common law institutions may have been adapted from similar legal institutions in Islamic law and jurisprudence, and introduced to England after the Norman conquest of England by the Normans, who conquered and inherited the Islamic legal administration of the Emirate of Sicily, and also by Crusaders during the Crusades.

Several other less common academic positions also exist.

Several historical varieties of laudanum exist, including Paracelsus ' laudanum, Sydenham's Laudanum ( also known as tinctura opii crocata ), benzoic laudanum ( tinctura opii benzoica ), and deodorized tincture of opium ( the most common contemporary formulation ), among others.

Several elements from Arabian mythology and Persian mythology are now common in modern fantasy, such as genies, bahamuts, magic carpets, magic lamps, etc.

Several types of common " berries " are shown, only one of which ( the blueberry ) is a berry by botanical definition.

Several species are among the most common of seabirds, including the Wilson's Storm Petrel ( an estimated 20 million individuals ) and the Short-tailed Shearwater ( an estimated 30 million individuals ); while the total population of some other species barely reaches more than two hundred individuals.

Several sources from the High Middle Ages suggest that there was a common Carantanian ( that is, Carinthian ) identity that slowly vanished after the 14th century and was replaced by a regional Carniolan identity.

Several specific federal court rulings have set precedents regarding both court decreed name changes and common law name changes ( changing the name at will ).

Several of the common names for species within the Tilia genus have Linden in their names.

Several PBS stations also air some CBC programming However, these programs are syndicated by independent distributors and are not governed by the PBS " common carriage " policy.

Several recent landmark studies have proven the importance of 2C19 genotyping in treatment using clopidogrel or Plavix.

Combinations of the above techniques produce a " hybrid " or " hyphenated " technique .< ref name =" pmid9008869 "> Several examples are in popular use today and new hybrid techniques are under development.

Several brain imaging techniques, such as EEG and fMRI, have been used for physical measures of brain activity in these studies.

Several different techniques exist to study cells are

Several laboratory scale techniques for distillation exist ( see also distillation types ).

Several modern theories have ventured to explain this decline, including the breakdown of trade routes to supply the needed metals, the lack of trace impurities in the metals, the possible loss of knowledge on the crafting techniques through secrecy and lack of transmission, or a combination of all the above.

Several techniques are used by DJs as a means to better mix and blend recorded music.

Several decades after Pearson's work with early versions of meta-analysis, Glass published the first application of modern meta-analytic techniques and triggered their broad application across the social and biomedical sciences.

Several different telephone line modulation techniques are used by fax machines.

Several of these siege techniques were used by the Romans but experienced a rebirth during the Crusades.

Several Baseball Prospectus authors have invented or improved upon widely relied upon sabermetric measures and techniques.

Several techniques have been performed for over a century, from the more invasive saphenous stripping, to less invasive procedures like ambulatory phlebectomy and CHIVA.

Several designer-makers established workshops in rural areas and revived old techniques.

Several mechanical techniques are used to dislodge sputum and encourage its expectoration.

Several techniques soon developed, such as the " stop trick ", wholly original to motion pictures.

Several important therapeutic techniques were pioneered at St. Elizabeths, and it served as a model for later institutions.

Several just-in-time compilation ( JIT ) techniques were pioneered and improved in Self research as they were required to allow a very high level object oriented language to perform at up to half the speed of optimized C. Much of the development of Self took place at Sun Microsystems, and the techniques they developed were later deployed for Java's HotSpot virtual machine.

Several other techniques are available depending on suitability and time constraints.

Several modern needlework designers have incorporated elements of Hardanger cut work into their embroidery designs and samplers, often combining them with other needlework techniques, stitches, speciality threads and other embellishments to great effect.

Several broad disciplines including Psychology, Human Factors and Cognitive Science subsume usability engineering, but the theoretical foundations of the field come from more specific domains: human perception and action ; human cognition ; behavioral research methodologies ; and, to a lesser extent, quantitative and statistical analysis techniques.

Several snapshotting techniques exists:

Several different recognition techniques are currently available.