"11. When they sing together, do they sing in unison, or in harmony, or with the occasional introduction of some drone accompaniment of the voice? "12. Is their singing in regular time, or does it partake of the character of the recitative? "13. Have they songs for solo and chorus,--or, with an air for a single voice, and a burden (or refrain) for a number of voices? "14. Describe the different kinds of songs which they have (such as sacred songs, war-songs, love-songs, nursery-songs, etc.), with remarks on the poetry. "_Instruments:_-- "15. What are their instruments of percussion (such as drums, castanets, rattles, cymbals, gongs, bells, etc.)? "16. Have they instruments of percussion containing sonorous plates of wood, glass, stone, metal, etc., upon which tunes can be played? and if so, write down in notation, or in letters, the tones emitted by the slabs. "17. Have they drums with cords, or some other contrivance by means of which the parchment can be tightened or slackened at pleasure? "18. Have they drums with definite tones (like our kettle-drums)? and, if so, what are the tones in which they are tuned when two or more are played together? "19. Any open hand-drums with one parchment only (like our tambourine)? "20. Are the drums beaten with sticks or with the hands? "21. What wind-instruments (trumpets, flutes, etc.) have they? "22. Any trumpets with sliding tubes (like the trombone)? "23. How are the flutes sounded? is there a plug in the mouth-hole? "24. Any nose-flutes? "25. What is the number and the position of the finger-holes on the flutes? "26. What tones do the flutes yield if the finger-holes are closed in regular succession upwards or downwards? "27. If the people have the syrinx (or Pandean pipe), ascertain the series of musical intervals yielded by its tubes. "28. Do the people construct wind-instruments with a vibrating reed, or some similar contrivance, inserted in the mouth-hole? "29. If they have a reed wind-instrument, observe whether the reed is _single_ (like that of the clarionet) or _double_ (like that of the oboe.) "30. Have they a kind of bagpipe? "31. What musical instruments have they which are not used by them in musical performances, but merely for conveying signals and for such like purposes? "32. Have they stringed instruments the strings of which are sounded by being twanged with the fingers? "33. Any stringed instruments twanged with a plectrum? "34. Any stringed instruments beaten with sticks or hammers (like the dulcimer)? "35. Any stringed instruments played with a bow? "36. If there are stringed instruments with frets on the neck (as is the case with our guitar), note down the intervals produced by the frets in regular succession. "37. What are the substances of which the strings are made? "38. Is there any peculiar contrivance on some of the instruments in the arrangement and situation of the strings?