Batcheller was the first composer, they say, who introduced the passage.
Anyway, this piece is very demanding, with lot of variations with different technique - as we go to the end: they become more and more difficult. And interesting!
Actually, once there was a thread about number of variations (15 or 17 or...?). Well, I use Delcamp's version. Maybe I am wrong but as much I understand each varatiation have exactly 8 measures. So, first variation is between 1th - 8th measure, second between 9th - 16th measure and so on,... until we reach last variation between 153th – 160th which means that we have 160:8 = 20 variations !
I am curious to hear what someone with much more musical education than me say about it.
Nevertheless, I hope that you like it and recommend to play it.
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