paragraph_text: Before the advent of the ASA system, the system of Weston film speed ratings was introduced by Edward Faraday Weston (1878–1971) and his father Dr. Edward Weston (1850–1936), a British-born electrical engineer, industrialist and founder of the US-based Weston Electrical Instrument Corporation, with the Weston model 617, one of the earliest photo-electric exposure meters, in August 1932. The meter and film rating system were invented by William Nelson Goodwin, Jr., who worked for them and later received a Howard N. Potts Medal for his contributions to engineering.

paragraph_text: First Electric Cooperative is a non-profit rural electric utility cooperative headquartered in Jacksonville, Arkansas. The cooperative was organized April 26, 1937, as the first electric cooperative in Arkansas under the federal Rural Electrification Act of 1935. The cooperative energized its first lines April 15, 1938, near Jacksonville with three employees and 150 members.

paragraph_text: Peter Mujuru (born 15 October 1982), known by his mononym Mashasha, is a Zimbabwean musician, bass guitarist, singer, songwriter and producer based in the UK. He is widely regarded as an original and important new voice in African music. His debut studio album, "Mashasha", which wasreleased by Elegwa Music in 2011, was acclaimed by critics internationally and won a Zimbabwe Music and Arts (ZIMAA) award for Best Album.

paragraph_text: Mandolin awareness in the United States blossomed in the 1880s, as the instrument became part of a fad that continued into the mid-1920s. According to Clarence L. Partee, the first mandolin made in the United States was made in 1883 or 1884 by Joseph Bohmann, who was an established maker of violins in Chicago. Partee characterized the early instrument as being larger than the European instruments he was used to, with a "peculiar shape" and "crude construction," and said that the quality improved, until American instruments were "superior" to imported instruments. At the time, Partee was using an imported French-made mandolin.

paragraph_text: George Washington Hough (October 24, 1836 – January 1, 1909) was an American astronomer born in Montgomery, New York. He discovered 627 double stars and made systematic studies of the surface of Jupiter. He designed and constructed several instruments used in astronomy, meteorology, and physics. From 1862 to 1874, Hough was director of Dudley Observatory, Albany, New York. In 1879 he was appointed professor of astronomy at the University of Chicago. He became the director of Dearborn Observatory when the observatory was moved to Evanston, Illinois. He introduced original plans for the dome and electric control for the telescope.

paragraph_text: The roots of hard rock can be traced back to the 1950s, particularly electric blues, which laid the foundations for key elements such as a rough declamatory vocal style, heavy guitar riffs, string-bending blues-scale guitar solos, strong beat, thick riff-laden texture, and posturing performances. Electric blues guitarists began experimenting with hard rock elements such as driving rhythms, distorted guitar solos and power chords in the 1950s, evident in the work of Memphis blues guitarists such as Joe Hill Louis, Willie Johnson, and particularly Pat Hare, who captured a "grittier, nastier, more ferocious electric guitar sound" on records such as James Cotton's "Cotton Crop Blues" (1954). Other antecedents include Link Wray's instrumental "Rumble" in 1958, and the surf rock instrumentals of Dick Dale, such as "Let's Go Trippin'" (1961) and "Misirlou" (1962).

paragraph_text: The First Seven Days is an album recorded by jazz musician Jan Hammer in 1975. It features extensive use of synthesizers, including the synthesized "guitar" parts (as on his follow-up album, "Oh Yeah?"), with the record jacket stating, "For those concerned: there is "no guitar" on this album." Other instruments used are grand piano, electric violin and percussion.

paragraph_text: Manifold vacuum can be used to drive accessories on automobiles. The best-known application is the vacuum servo, used to provide power assistance for the brakes. Obsolete applications include vacuum-driven windscreen wipers and Autovac fuel pumps. Some aircraft instruments (Attitude Indicator (AI) and the Heading Indicator (HI)) are typically vacuum-powered, as protection against loss of all (electrically powered) instruments, since early aircraft often did not have electrical systems, and since there are two readily available sources of vacuum on a moving aircraft—the engine and an external venturi. Vacuum induction melting uses electromagnetic induction within a vacuum.

paragraph_text: Electric Café is the ninth studio album by the electronic group Kraftwerk, originally released in 1986. In October 2009 it was re-released under its original working title, Techno Pop. The initial 1986 "Electric Café" came in versions sung in English and German, as well as a limited "Edición Española" release, featuring versions of "Techno Pop" and "Sex Object" with only Spanish lyrics. It was the first Kraftwerk LP to be created using predominantly digital musical instruments, although the finished product was still recorded onto analog master tapes.

paragraph_text: Bitches Brew is a studio double album by American jazz musician, composer, and bandleader Miles Davis, released on March 30, 1970 on Columbia Records. It marked his continuing experimentation with electric instruments that he had previously featured on the critically acclaimed "In a Silent Way" (1969). With these instruments, such as the electric piano and guitar, Davis rejected traditional jazz rhythms in favor of loose, rock-influenced arrangements based on improvisation.

paragraph_text: The first known electrically illuminated Christmas tree was the creation of Edward H. Johnson, an associate of inventor Thomas Edison. While he was vice president of the Edison Electric Light Company, a predecessor of today's Con Edison electric utility, he had Christmas tree light bulbs especially made for him. He proudly displayed his Christmas tree, which was hand - wired with 80 red, white and blue electric incandescent light bulbs the size of walnuts, on December 22, 1882 at his home on Fifth Avenue in New York City. Local newspapers ignored the story, seeing it as a publicity stunt. However, it was published by a Detroit newspaper reporter, and Johnson has become widely regarded as the Father of Electric Christmas Tree Lights. By 1900, businesses started stringing up Christmas lights behind their windows. Christmas lights were too expensive for the average person; as such, electric Christmas lights did not become the majority replacement for candles until 1930.

paragraph_text: In 1985, in a campaign initiated by then CBS Musical Instruments division president William Schultz (1926 -- 2006), the Fender Electric Instrument Manufacturing Company employees purchased the company from CBS and renamed it Fender Musical Instruments Corporation (FMIC). Behind the Fender name, FMIC has retained Fender's older models along with newer designs and concepts. The sale however did not include the old Fullerton factory; FMIC had to build a new facility in nearby Corona.

paragraph_text: Application of electric motors revolutionized industry. Industrial processes were no longer limited by power transmission using line shafts, belts, compressed air or hydraulic pressure. Instead every machine could be equipped with its own electric motor, providing easy control at the point of use, and improving power transmission efficiency. Electric motors applied in agriculture eliminated human and animal muscle power from such tasks as handling grain or pumping water. Household uses of electric motors reduced heavy labor in the home and made higher standards of convenience, comfort and safety possible. Today, electric motors stand for more than half of the electric energy consumption in the US.

paragraph_text: The PP-2000 (Russian: ПП-2000) is a submachine gun/machine pistol made by the KBP Instrument Design Bureau. It was first publicly displayed at the Interpolytech-2004 exhibition in Moscow even though its patent was filed in 2001 and issued in 2003.

paragraph_text: A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. Analog voltmeters move a pointer across a scale in proportion to the voltage of the circuit; digital voltmeters give a numerical display of voltage by use of an analog to digital converter.

paragraph_text: The first successful classical unified field theory was developed by James Clerk Maxwell. In 1820 Hans Christian Ørsted discovered that electric currents exerted forces on magnets, while in 1831, Michael Faraday made the observation that time - varying magnetic fields could induce electric currents. Until then, electricity and magnetism had been thought of as unrelated phenomena. In 1864, Maxwell published his famous paper on a dynamical theory of the electromagnetic field. This was the first example of a theory that was able to encompass previously separate field theories (namely electricity and magnetism) to provide a unifying theory of electromagnetism. By 1905, Albert Einstein had used the constancy of the speed of light in Maxwell's theory to unify our notions of space and time into an entity we now call spacetime and in 1915 he expanded this theory of special relativity to a description of gravity, General Relativity, using a field to describe the curving geometry of four - dimensional spacetime.

paragraph_text: The typical symphony orchestra consists of four groups of related musical instruments called the woodwinds, brass, percussion, and strings (violin, viola, cello and double bass). Other instruments such as the piano and celesta may sometimes be grouped into a fifth section such as a keyboard section or may stand alone, as may the concert harp and electric and electronic instruments. The orchestra, depending on the size, contains almost all of the standard instruments in each group.

paragraph_text: Being a private facility, it is situated inside the Meralco Center at Ortigas Avenue in Pasig City. The transformation of the JFCH into an integrated corporate wellness center made the Manila Electric Company the first corporation in the Philippines to institutionalize the implementation of such a program.

paragraph_text: Orchestral Favorites is an album by Frank Zappa first released in May 1979 on his own DiscReet Records label. The album is instrumental and features music performed by the 37-piece Abnuceals Emuukha Electric Symphony Orchestra.

paragraph_text: In the 1930s, musician and inventor Paul Tutmarc from Seattle, Washington, who was manufacturing lap steel guitars, developed the first electric string bass in its modern form, a fretted instrument designed to be played horizontally. The 1935 sales catalog for Tutmarc's electronic musical instrument company, Audiovox, featured his ``Model 736 Bass Fiddle '', a four - stringed, solid - bodied, fretted electric bass instrument with a 30 ⁄ - inch (775 - millimetre) scale length. The adoption of a guitar's body shape made the instrument easier to hold and transport than any of the existing stringed bass instruments. The addition of frets enabled bassists to play in tune more easily than on fretless acoustic or electric upright basses. Around 100 of these instruments were made during this period.

Question: when was the first electric instrument that Mashasha played made?
Answer: the 1930s