SEA-FISHERIES LABORATORY. 



193 



eat at first, but by August 25th had eaten four small 

 pieces of fisli (plaice) weighing about 8 grams. 



Date. 

 August 25-26 



Time 

 Interval, 

 h. m. 

 ... 24 00 



Oxygen used 



i 



Milligrams 

 per litre. 



4-36 



1-24 



0-37 



311 



1-40 



4-77 



up. 



Total 



mg. 



199 

 56 

 17 



142 

 64 



217 



Oxygen appearing 

 in Carbon-dioxide. 



Milligrams 

 per litre. 



2-6 



2-2 



10 



2-2 



1-9 



3-2 



Total 

 mg. 

 118 



„ 26-27 



„ 27-28 



... 23 20 

 ... 23 55 



100 

 46 



28-29 



... 23 45 



100 



„ 29-30 



„ 30-31 



... 23 35 

 ... 22 45 



87 

 146 



During the last few days green vegetable matter had 

 appeared in the carboy and on the carapace of the lobster, 

 and the days with a low yield were those of bright day- 

 light. From here on, except where noted, the carboy was 

 covered up by an inverted wooden barrel. 



Oxygen appearing 

 Oxygen used up. in Carbon-dioxide. 



Date. 



Time 

 Interval. 



Milligrams 



Total 



, « 

 Milligrams 



— \ 

 Total 





h. m. 



per litre. 



mg. 



per litre. 



mg. 



Aug. 31-Sep 1 ... 



... 23 50 



4-86 



221 



4-2 



191 



September 1-2 ... 



... 24 00 



4-40 



200 



4-5 



205 



2-3 ... 



... 24 00 



4-04 



184 



1-6 



73 



3^ ... 



.. 23 40 



4-10 



187 



4-8 



219 



4-5 ... 



.. 23 50 



311 



142 



3-5 



159 



On September 5th, being a bright sunny day, the 

 covers were left off purposely to observe effects, and see if 

 the falling oif previously had been due to photo-synthesis 

 by the plants from the respiratory carbon-dioxide of the 



lobster. 



Date. 



Time 



Oxygen appearing 

 Oxygen used up. in Carbon-dioxide. 



Milligrams Total 

 per litre. mg. 



0-6 



Interval. Milligrams Total 

 h. m. per litre. mg. 

 September 5-6 23 30 0-06 — 



The sea-water at the commencement of this period of 

 23 hours 30 minutes contained 8'96 milligrams per litre 

 of dissolved oxygen, and at the end 902 milligrams per 

 litre, so showing that the small amount of green material 

 within had been more than able to re-synthesise all pro- 

 duced by the animal. If this be contrasted with the 



