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Chapter 12. Everything through Electricity

           "Thesetwohullsarecomposedofsteelplates,whosedensityisfrom.7to.8thatofwater.Thefirstisnotlessthantwoinchesandahalfthickandweighs394tons.Thesecondenvelope,thekeel,twentyincheshighandtenthick,weighsonlysixty-twotons.Theengine,theballast,theseveralaccessoriesandapparatusappendages,thepartitionsandbulkheads,weigh961.62tons.Doyoufollowallthis?"

           "Ido."

           "Then,whentheNautilusisafloatunderthesecircumstances,one-tenthisoutofthewater.Now,ifIhavemadereservoirsofasizeequaltothistenth,orcapableofholding150tons,andifIfillthemwithwater,theboat,weighingthen1,507tons,willbecompletelyimmersed.Thatwouldhappen,Professor.ThesereservoirsareinthelowerpartoftheNautilus.Iturnontapsandtheyfill,andthevesselsinksthathadjustbeenlevelwiththesurface."

           "Well,Captain,butnowwecometotherealdifficulty.Icanunderstandyourrisingtothesurface;but,divingbelowthesurface,doesnotyoursubmarinecontrivanceencounterapressure,andconsequentlyundergoanupwardthrustofoneatmosphereforeverythirtyfeetofwater,justaboutfifteenpoundspersquareinch?"

           "Justso,sir."

           "Then,unlessyouquitefilltheNautilus,Idonotseehowyoucandrawitdowntothosedepths."

           "Professor,youmustnotconfoundstaticswithdynamicsoryouwillbeexposedtograveerrors.

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Roboto Lora
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