Mlxrrflaneow Intelligence. 



mining. The topics discussed in the three chapters of the 

 now made public are: sub-aqueous explosions, electrical 

 and modes of ignition. The remaining chapters of the con 

 report will treat of kindred topics, rehiring to submarine i 

 torpedo cables, fish torpedoes, and so on ; being of a confid 

 nature they will be printed only for the use of the School of Si 

 rim- Mining at Willets Point/ 



< hapter I. having 5 he general head of Sub-aqueous Explo 

 contains a description of the apparatus used for the measure 

 of the force of the explosion ; the physical phenomena obse 



kinetic energy developed by explosions of various kinds f. 

 unit of surface exposed; and a discussion of the various kii 



s fuses of " medium 

 r ith magneto-electric machin 



pparatus of v 

 licit v and a c 



rig the familia 



NheT>ftaie°"i 



