DEEP-SEA SOUNDING, 



This clever coutrivauce, since well known as Brooke's 

 *' Deejvsoa Sounding Apparatus," is represented in 

 the annexed engravings (figs. 2 & 8). aa is a cannon- 



Kig. 3. — Striking the &ea-lK)ttoni. 



hall, perforated, so that the rod or cylinder, bb, may he 

 passed through it. Fig. 2 shows the ap[)aratns ready 

 for hein^ic lowered into the sea. The canniMi-liall is 



