40 



farten standsedes. Med Stjerten haledes Skrabetou- 

 get atter ind ti] Hakkebrættet og holdtes inde med Bugten 

 af en Ende. Til Stjerten i Pukkenboltskousen fastgjordes 

 en efter Dybden afpasset Vægt. hvortil brugtes 3 eller 4. 

 til de større Dybder 6 af Baillie-Maskinens Lodder, der 

 vejede 27 Kiloer. (55 Pd.) hver. Man slåp Tampen af 

 Enden, væltede Vægten overbord, og denne Iøb da med 

 Kousen. nedover langs Touget, imltil den standsedes af den 

 paasatte Trætærs. Dette kunde toles, naar man holdt 

 Haanden paa Touget. 



Skibet lan nu stille, medens Lodder og Skrabe sank. 

 Vi regnede, etter flere Forsøg, at der behøvedes 12 Minut- 

 ter for at Skraben skulde synke 100 Favne. Skrabens 

 (eller rettere Trawlens) og Loddernes Synkning er anskue- 



not less than double the deptb. nay for smaller depths 

 even more. 



The engine was now stopped, after vvhich we hauled 

 in the dredge-rope, as before, to the taffrail. and kept it 

 up in a bight of ropes end. With the lizard was then 

 made fast to the wooden thimble a weight proportioned to 

 the depth. consisting of 3 or 4. and for the deepest dredg- 

 ings, of as many as li of the sinkers of the Baillie sound- 

 ing-machine. weighing each 55 pounds. We now. after let- 

 ting go the rope. tilted the weight overboard. wbich spun 

 down along it till stopped by the wooden toggle. The shock 

 of its arrest was distinctly perceptible to a person who bad 

 his hand on the rope. 



The vessel was now kept stationary, while the 

 weight and the dredge were sinking. After some expe- 

 rience. we calculated the time required for the dredge to 

 sink lou fathoins. to be about \'2 minutes. Fig. 20 will 



Fig. 20, 



liggjort i Fig. 20. Den i Figuren antagne Dybde er 1300 

 Favne, følgelig er Skih og Trawl tegnet i forstørret Maale- 

 stok. De prikkede Linier viser Loddernes. Skrabetoughex- 

 ens og Trawlbommens Bane under Synkningen, under For- 

 udsætning af, at Trawlen synker med en Hastighed, der er 

 lidt mindre end den. hvormed Lodderne nærmer sig Bunden. 

 \dr\ Lodderne naar Bund. svæver endnu Trawlen i Våndet, 

 og det sidste Stykke al' dens Bane vil være næsten lodret. 

 Erfaring viste, at Trawl og Skrabe med den brugte Frem- 

 gangsmaade i Elegelen uden Vanskelighed kom i rigtig 

 Stilling paa Bunden. Er Skrabens (Trawlens) Synken meget 



langsommere end Loddernes. vil den falde lodret ned paa 

 Hunden med sin tunge Ende loran. Fr derimod dens Syn- 



give an idea of the descent of the dredge, or rather of the 

 trawl. The supposed depth in the diagram being 1300 

 fathoms. the vessel and the trawl are of course on a niuch 

 larger se.ale.. The dotted lines represent the lines ol' de- 

 scent of the weight, the shaekle. the dred^e-rope. and 

 the beam of the trawl. assuming the trawl to sink more 

 slowly than the weight. When the weight strikes the bot- 

 tom, the trawl has still some distance to travel, and the 

 last part of its line of descent will he well-nigh perpen- 

 dicular. We found that, when worked in the manner 

 described above, botb trawl and dredge could as a rule 

 without difficulty he made to reacb the bottom in the right 

 position. It' the dredge oi' trawl descend much more slowly 



