349 



A Table shewing the Bate at which the 9 lb. Plummet (11/5 by 

 1*7 inches) descended with a Line ofl-\§th of an inch dia- 

 meter (and weighing, when dry. 1 lb. per 100 fathoms), 

 through a depth of nearly 9 English miles of Ocean Water » 

 at which depth it apparently reached the bottom. 







Interval Interval 







Interval Interval 



Successive 

 Depths. 



Notation. 



"§ 100 

 Fathoms 



*$ 1000 

 Fathoms. 



Successive 

 Depths. 



Notation. 



"#100 

 Fathoms 



*$ 1000 

 Fathoms 



li. 



m 



s. 



h. 



m. 



s. 



h. 



m. s. 



h. 



m. 



s. 



h. 



m 



. s. 



h. 



m. s. 



. 



















— 



■„ 



— 



— 



— 



— 









— — 



Immersion 



8 



30 



45 















4000 Fms. 



11 



39 



29 





S 



19 



1 



K 



39 



100 Fms. 





32 



15 





1 



30 









4100 ... 





49 



10 





c 



41 









200 ... 





34 



20 





2 



5 









4200 ... 





57 



45 





g 



35 









300 ... 





31 



45 





2 



2£ 









4300 ... 



12 



6 



10 





c 



25 









400 . . . 





3£ 



15 





2 



3C 









4400 ... 





14 



45 





S 



5 









500 ... 





41 



4 





2 



4£ 









4500 ... 





21 



40 





7 



25 









600 ... 





it 









2 



51 









4600 ... 





31 



5 





9 



25 









7C0 ... 





4£ 









3 



C 









4700 ... 





40 



10 





9 



5 









800 ... 





51 



5 





3 



t 









4800 ... 





48 



35 





8 



25 









900 ... 





54 



2C 





3 



u 









4900 ... 





57 



1C 





8 



35 









1000 ... 





5£ 









3 



4C 







27 



15 



5000 ... 



1 



6 



35 





9 



25 



1 



27 



6 



1100 ... 



9 



1 



5C 





3 



5C 









5100 ... 





17 



55 





11 



20 









1200 ... 





5 



45 





3 



55 









5200 ... 





27 









9 



5 









1300 ... 





£ 



30 





3 



45 









5300 ... 





36 



25 





9 



25 









1400 ... 





12 



45 





3 



15 









5400 ... 





45 



55 





9 



30 









1500 ... 





16 



40 





3 



55 









5500 ... 





56 



15 





10 



20 









1600 ... 





20 



40 





4 













5600 ... 



2 



6 



55 





10 



10 









1700 ... 





24 



50 





4 



10 









5700 ... 





19 



40 





12 



45 









1800 ... 





29 









4 



10 









5800 ... 





30 



15 





10 



35 









1900 ... 





33 



15 





4 



15 









5900 ... 





40 



55 





10 



46 









2000 ... 





37 



40 





4 



25 







39 



40 



6000 ... 





52 









11 



5 



1 



45 



25 



2100 ... 





42 









4 



20 









6100 ... 



3 



5 



10 





11 



10 









2200 ... 





46 



30 





4 



30 









6200 ... 





14 



40 





9 



30 









2300 ... 





51 









4 



30 









6300 . . . 





25 



20 





10 



40 









2400 ... 





55 



30 





4 



30 









6400 ... 





37 



55 





12 



35 









2500 ... 



10 







5 





4 



35 









6500 ... 





48 









10 



5 









2600 ... 





4 



45 





4 



40 









6600 ... 





57 



50 





9 



50 









2700 ... 





9 



45 





5 













6700 ... 



4 



8 









10 



10 









2800 ... 





14 



50 





5 



5 









6800 ... 





19 



15 





11 



15 









2900 ... 





20 



10 





5 



20 









6900 ... 





30 



45 





11 



30 









3000 ... 





25 



50 





5 



40 







48 



10 



7000 . . . 





41 



15 





10 



30 



1 



49 



15 



3100 ... 





30 



15 





4 



25 









7100 ... 





52 



15 





11 













3200 ... 





36 



15 





6 













7200 ... 



5 



1 



50 





9 



35 









3300 ... 





43 



10 





6 



55 









7300 ... 





11 



40 





9 



:o 









3400 ... 





50 



40 





7 



30 







| 



7400 ... 





24 



10 





12 



30 1 









3500 ... 





58 



45 





8 



5 







1 



7500 ... 





34 



20 





10 



10; 









3600 ... 



11 



6 



50 





8 



5 









7600 ... j 





44 



22 





10 



2 









3700 ... 





14 



45 





7 



45 







1 



7700 ... 





55 



30 





11 



8 : 



1 



14 



15 



3800 ... 





22 



30 





'i 



45 







1 



1 









3900 ... 





31 



10 





8| 



40 





| 



i 



Total Interval, i 



9 



24 45 



Total fathoms, 7706 = 15,412 yards = 8| English miles. 



Note. — This line could sustain 72 lb. in air, at a suspension of one fathom ; 

 but as the 7706 fathoms weighed 77 lb. (in addition to the plummet) became 

 weighted one-half more by saturation (equal to 115 lb.), it could not bring up the 

 plummet again to exhibit to us the nature of the bottom ; it broke, whilst carefully 

 reeling it in, at 140 fathoms below the water line. 



H. M. DEKHAM, Captain, R.N. 

 VOL. LIV. NO, CVIII.— APRIL 1853. 2 A 



