SEA-FISHERIES LABORATORY. 



401 



Experiment IV. 



Octopus. — Not weighed at beginning on account of 

 liability to injury in weighing, weight at end on 

 September 13th, 1912 = 370 grams. Duration of experi- 

 ment from August 12th, till September 13th = 32 days. 

 Daily volume of sea-water = 47*895 x 2 litres = 95*79 litres. 



Date 

 1912. 



Time 



Interval. 



h. m. 



Oxygen 



Milligrams 

 per litre. 



used up. 



i Total m.g. 

 in Carboy. 



Oxygen appearing 

 in Carbon-dioxide. 



Milligrams Total m.g 

 per litre, in Carboy 



7USt 12 .... 



4 



50 



401 



192 



6-1 



292 



„ 12-13. 



14 



00 



6-63 



317 



7-0 



335 



„ 13 .... 



9 



30 



4-95 



237 



7-3 



349 



„ 13-14. 



13 



10 



6-03 



288 



6-7 



320 



„ 14 .... 



10 



40 



4-27 



205 



7-0 



335 



„ 14-15. 



12 



30 



5-73 



275 



6-4 



306 



„ 15 .... 



10 



25 



4-37 



210 



5-4 



259 



„ 15-16. 



12 



35 



7-29 



349 



7 



335 



„ 16 .... 



10 



30 



7-12 



341 



6-4 



306 



„ 16-17. 



12 



50 



7-89 



378 



7-3 



349 



„ 17 .... 



10 



10 



7-58 



363 



7-0 



335 



„ 17-18. 



12 



45 



7-96 



381 



7-0 



335 



„ 18 .... 



10 



35 



7-66 



367 



7-3 



349 



„ 18-19. 



12 



30 



7-81 



374 



6-4 



306 



„ 19 .... 



10 



25 



7-50 



359 



7-3 



349 



„ 19-20. 



13 



05 



812 



389 



8-3 



397 



„ 20 .... 



11 



05 



711 



340 



7 



335 



„ 20-21. 

 „ 21 .... 



11 



50 

 00 



7-34 

 6-64 



351 

 318 



6-3 

 5-4 



301 



10 



259 



„ 21-22. 



12 



45 



7-72 



369 



5-7 



274 



, 22 .... 



10 



25 



6-72 



321 



61 



292 



„ 22-23. 



13 



15 



7-96 



381 



6-7 



320 









Total 



7,205 



Total 



7,038 



Exper 



iment in 



:erru 



pted. Food ofi'ei 



ed. but little or 



none taken. 



