Samuel Adelstein described the Lombardi mandolin in 1893 as wider and shorter than the Neapolitan mandolin, with a shallower back and a shorter and wider neck, with six single strings to the regular mandolin's set of 4. The Lombardi was tuned C, D, A, E, B, G. The strings were fastened to the bridge like a guitar's. There were 20 frets, covering three octaves, with an additional 5 notes. When Adelstein wrote, there were no nylon strings, and the gut and single strings "do not vibrate so clearly and sweetly as the double steel string of the Neapolitan."
How many octaves did the Lombardi cover?
three octaves

Recent research supports Jefferson's claim. Brunetti and Weder found "evidence of a significant relationship between more press freedom and less corruption in a large cross-section of countries." They also presented "evidence which suggests that the direction of causation runs from higher press freedom to lower corruption." Adserà, Boix, and Payne found that increases in newspaper readership led to increased political accountability and lower corruption in data from roughly 100 countries and from different states in the US.
Who discovered that more people reading newspapers resulted in higher political accountability?
Adserà, Boix, and Payne

In addition to and independent of the division into suras, there are various ways of dividing the Quran into parts of approximately equal length for convenience in reading. The 30 juz' (plural ajzāʼ) can be used to read through the entire Quran in a month. Some of these parts are known by names—which are the first few words by which the juzʼ starts. A juz' is sometimes further divided into two ḥizb (plural aḥzāb), and each hizb subdivided into four rubʻ al-ahzab. The Quran is also divided into seven approximately equal parts, manzil (plural manāzil), for it to be recited in a week.
How many ahzab are in a juz'?
two