ii- i nut 



SOUND IN t4 WIRE. 



DREDGING CA I tMv 



W. M. Down. 



| Up, ££L M. 



v .MS. 



M. Down. 



| Up M 



/ 







» / 





















V 







































200 



























sop 



























-100 



























500 























































700 



























800 



























000 



























1000 



























tlQp 



























1200 





















































1400 



























1500 



























moo 



























1700 



























1800 

























1000 

























2000 



























2100 



























2200 



























& 



























•Mum 



























$soo 



























2000 



























2700 



























2MU0 



























3000 



























WJOO 



























woo 





















































:i:t(n> 



























MOG 



























;:;,imi 

















V 











:i 



























ItTOO 



























fl$00 



























8000 



























4000 



























1l£Ht 



























■J&k> 



























l: 



























1 



























Arm 



























\ > 



























■1700 



























4H00 



























4000 















