rlso eats its cfvm youn.g» Sund mnde r. fev/ oxpcrinents in order to 

 prevent these cnlnLiities, but v.-itlioub success. It is therefore 

 naturc.l for me in my future vrork to go brclc to+he method used by niy 

 father, i.e», to -hatch eggs which are taken off the lobsters. j..lready 

 in 1885 he hatched thousands of lobster J'oung xvith a loss of about 50 

 per cent; in 1892, the loss was only five per cent of brood fron 30 

 spavm lobsters (i.e. 150^000 to 200,000?). This method also has the 

 advantage in that v/e do not have the vj-ork and risk of having so many 

 lobsters to take care of. In this respect it mtHI be a great advan- 

 tage to have the rearing station at Fl/devigen where we can use the 

 hatching equipment, - but of course ny father's method might also be 

 modified in such a Tray that it could be used also at a floating 

 station. ■ ' ' 



From the enclosed tables you T;ill see that the development of the 

 ■hatching essentially follows the changes in temperature, however in 

 such a way that the maxim.um of number of young per -day decreases a 

 few dr.ys after maxiinum in temperature,- v/hich is in accordance -vrf-th 

 what V\re might ex]pect» 



The rearing apparatus were started July 21 and were in v/'ork up 

 to August 21 - only wit!li the interruptions caused by the motor; the 

 auxiliary motor was unfit for use. ■'-t the beginning the engine 

 stopped very olten, but later on it worked regularly for about a 

 week at- a time bet\veen each cleaning; according t"o the ';iournal, the 

 motor stopped 12 times, averaging three hours at a time; in a ddition 

 there were a similar number of short interr^iptionfe T7hich r/ere not 

 entered into the journal. 



Such stops and cleanings of the engine at all hom'S are very un- 

 fortunate, both directly for the rearing apparatus and especially 

 because we have to give all our attention to the motor to keep it 

 going. The rearing vrork suffers greatly because of this; it \Tould be 

 a very great advr.ntage if the motor could be electrically drix^en. 



■- I tried to carry on the rearing experiments in such a v;ay that 

 they ¥fould give some information about the conditions under v;}iich the 

 yOung' ViTould thrive best, but because of the short time and becaiise of 



■the difficulties with the motor, not all the experiments could be 

 quite completed-; they T;-ill be repeated next year. For t ho experiments 

 we partly used the roaring boxes as they had been used by Sund, partly 

 with different changes - n few of which appeared to be favorable. 



..Hovirever, tis the rearing boxes are so large that they cannot bo kept 

 under accurate control, I had some quite small sample boxes made 



,(40 X 45 X 75 -centimeters). These v/ere made of frames on which vras 

 nailed perforated celluloid of the same kind \';hich v.'as used for the 

 "windows" of the boxes. These were hung in straps an the vessel, in 

 such a v/ay that the upper fourth (l/4) v/as above t?.io v/ater. Lt first 

 it was necessary to find out what v/a.s the most appropriate food for 

 the young, and also in v;hioh vm^' the young 'should be fed. 



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