sufficient water supply, I hr.ve follovred another principle in the 

 construction vhich ciifJ.'ers fron that of the Anericr.n scientists. As 

 the pictiires and the descriptions of the last mentioned bags shov;', 

 these consist mainly of canvas cloth rxith relatively small openings, 

 v;hich are covered by a fine-meshed copper-net. There are only 

 three openings, i.e., one in the bottom, and tiTo on the sides; two 

 sides are made exclusively' of cftnvas cloth. 



I have not tried these bags in cormection with the i^ierican 

 method on o-ur coast, but the experience I have made during many years 

 of rearing experiments in floating boxes, shows that the result would 

 be less satisfactory. I have already' m.entioned that the poorer the 

 water supply, the poorer the result of the rearing, and there is no 

 reason to believe that these conditions v/ould be any different even 

 if there is movem.ent in the boxes. Especially I v/nnt to draw the 

 attention to the fact that brass (copper) netting is very unfortunatee 

 .... .In spite of' this, in my opinion, unfortunate construction of 

 the bags, relatively good results have been obtained in /aaerica v/ith 

 this m.ethod. The reason is probably partly that the' brood needs a 

 relatively shrrt time for its development in the higher temperature 

 over there, partly ''oecause good hygienic conditions are created by 

 the moveraeut in the bo::es» I an, however, of the opinion, that the 

 principle: bes t possibl e v rate r supply , is just as important as the 

 principle: rxo vement in the bo::cs, if the rearing should give good 

 results, at least as far as our coast is concerned. I think there- 

 fore, that the bags shoul^''- be maJe as open as possible? neither must 

 copper or i.ietal netting bo used to cover the openings. 



\Yith regard to the apparrtus and hov: it vrorks I still have to 

 give the following details: 



(The following pages give a detailed description) 



The experiments I ma^le 'bjrin;-, the summer 1908 ct Kvitings/ with 

 the apparatus described above, had tlui following development and 

 results: 



In one of the fjags (vriiich we may call E), there v/erc put in 

 some brood, which for the greater part "./ere not new-hatched, rut vrere 

 taken from a box where some mother lobsters were kept for hatching 

 of their eggs. Some of the yo\iiig lobsters which vrere _.\xt in vrere 

 already in the 2d stage. I do not laiow the exact nunber of the 

 young lol'Sters which were put in^ but they were probably between 

 4000 and 5000 in number. 



20 



