Wondering how to work out bow direction?Till now I usually start bars with a down bow,(or upbow if starting on an upbeat). unless otherwise indicated. I'm working on Simandl 30 etudes .Some pieces give slurs ,that keep even number of bows per bar(ie: etude#13 bar 4 or 6), or indicate a specific bow direction(ie:etude#15 bar 2 ). I've figured out most pieces but , I 'm really stuck on Etude#14. This piece has many switches of even ,then odd numbers of notes per bar and no bow markings are indicated. I haven't been able figure out a bowing pattern that works for me (up till now this hasn't been a problem). Any ideas on this piece and general rules for bow direction would be greatly appreciated .