The "".bsblutely quiet nnd safe cinchorage as vrell as the near- 

 ness of a tovm and the bacteriological institute there rrore of 

 gret.t advantage. ■. - ;■ 



For keeping the laother lobsters use v.'ns laade of looster pots. 

 -The. upper and lovj-er walls of these rrere mr.de of vj-ood v;hile the 

 sidev;alls consisted of so called "accordion" screen, the diuens- 

 ions were 1 iio x .1 eio x 0.3 n, in depth. In practice' they proved 

 tc have one disadvantage. Although the screen had been tarred 

 before use it was seriously affected by corrosion before the end 

 of the season until finally the holes becr.ne so large' that a 

 number of lobsters escapedo As to their n-.ain purpose, na:iely 

 l:eeping alive the raother lobsters, these containers left nothing 

 to be desiredo During the two or three ;-'onths the lobsters v/ere 

 kept not a single fatality occurred which oould have been prevented 

 by a different construction of the pens. 



The rusting of screens v>rill be prevented by substituting 

 heavier material, as for instance perforated steel plate and noro 

 frequent tarring as is done in the case of oyster screens. 



It was my plan initially to let the eggs hatch in a lobster 

 pot floating in the propagation tank in the manner described by 

 Dr. Mead. I abandoned this idea however because: . 



1. One lacks control over the nimber of Ic^rv-qe present 

 in a tank. The Anerican experinents, v/hich provided 

 for nunerous tanl-rs of which one could be especially 

 equipped for hatching, were not thus handicapped. 

 ■In that ease the larvae irxiy be scooped up and counted 

 out into the propagation tanlrs. 'J'hen, as. with us, one 

 disposes of only tv/o tanlcs this nethod cannot be 

 applied© .-,_.. 



2c In Norvray very poor results vrere had v/iththis way of 

 hatchiPxg and, according t o Sund and Dannovig, vrtio were 

 very enphatic in their opinion, not a snail part of 

 the dii'ficulty v/as .in the getting, of a useful nunber 

 of larvae. They vrore i.nc lined to blane this on the 

 probability that the larvae, borne on the water current, 

 and passing the nother lobster, were eaten by the latter. 



I then attenpted to construct a systen Virhich would overcome 

 both of these objections,. -In principle it a:aounted to the expect- 

 ation that a vmter current passin^ the nother-lobstcrs would carry 

 away the hatched larvae and deposit theji in a separate tanJ-;. In 

 a large, rectangular tanlc: divided into five sections by neans of 

 chicken vdro screens, the ripe nother lobsters were placedo The 

 pionp installation brought vrater into this tanlc, hovrcvcr not 

 directly but tlirough a gutter placed along the side ver the 

 entire length© At both ends of this gutter vmter could flow out 



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