Chapter 1 *This article appeared in the journal Anahit (Paris, 1907), pp. 70-73 & 197-130; and also in Le Mercure Musical (Paris, 1907), pp. 472-488. ?. T'erlemezyan, Hodvatsner, pp. 15-44; Abel Oghlougian, Grakan Nshkhark', pp. 145-170; Chapter 2 *The study first appeared in Zeitschrift jur armenische Philologie (Marburg, 1, 1901), pp. 87-96. In 1908 Ghorghanian published a translation in his Kavkazskaya Musika, pp. 47- 50. The first Armenian translation appeared in the journal T'atron ew Erazhshtout'iwn 5-6, 1910, pp. 51-52, and then again as a monograph in Baku in 1910. R. T'erlemezyan, Hodvatsner, pp. 51-62; Abel Oghlougian, Grakan Nshkhark', pp. 171-180; Chapter 3 *Published in Nawasard (Constantinople, 1914), pp. 312-336; ?. T'erlemezyan, Hodvatsner, pp. 68-101; Abel Oghlougian, Grakan Nshkhark', pp. 181-210; Chapter 4 *First published in Ararat (Etchmiadzin), 1894, July, pp. 222-227; August, pp. 256- 260. Reprinted in R. T'erlemezyan, Hodvatsner, pp. 105-125; Abel Oghlougian, Grakan Nshkhark, pp 71-86; Chapter 5 *First published in Ararat (Etchmiadzin), 1898, pp. 111-117; ?. T'erlemezyan, Hodvatsner, pp. 137-152; Abel Oghlougian, Grakan Nshkhark', pp. 98-110., M. Ekmalian, Gr. Meghvinian; Chapter 6 *The, German original appeared in Sammelbande der Internationalen Musikgesellschaft, ed. Oskar Fleischer & Johannes Wolf 1 (1899-1900), pp. 54-64. It was translated into Armenian by Hakob Harut'yunyan. An abridged version was published by Ghorghanyan in Kavkazakaya Muzika without the author's identity. Retranslated into Armenian by Psak Vardapet T'umayian and published in Sion (April 1936), pp. 118-126. R. T'erlemezyan, Hodvatsner, pp. 153-165; Abel Oghlougian, Grakan Nshkhark' pp. 115-125; Chapter 7 *Komitas wrote this article in Etchmiadzin on March 15 th, 1910 and was first published in the journal Tachar 10 (Constantinople 1914), p. 311; ?. T'erlemezyan, Hodvatsner, pp. 166-167; Abel Oghlougian, Grakan Nshkhark' pp. 126-127; Chapter 8 1First published in Ararat (Etchmiadzin), 1900, pp. 367-68., L. Eghiazarian; Chapter 9 *This unfinished study of Komitas was published in Ararat (Etchmiadzin), 1897, pp. 221-225. Reprinted in R. T'erlemezyan, Hodvadsner, pp. 126-136; Abel Oghlougian, Grakan Nshkhark', pp. 89-97. An important feature of the study is the comparative table of Eastern and Western semi-tonal scale which Komitas provides;