SEA-FISHERIES LABORATORY. 



241 



Titration Values of Sea-Water at different Seasons 

 of the Year — continued. 



Date. 



Place of Collection 

 of Sample. 



No. of c.c. of 

 N/100 HC1 to 

 neutralise 100 

 c.c. to phenol- 

 phthalein. 



"Buffer" or 



"Reactivity " 



Effect between 



P H ,10- 8 - 4 and 



Ph, 10~ 4 X 



10~ 4 N. 



No. of c.c. of 



N/100 HC1 



required to 



neutralise 100 



c.c. to methyl 



orange. 



June 14- 

 „ 15- 



Mar. 1- 

 May 18- 



„ 18- 



25- 

 25 



June 3- 



„ 3- 



„ 12- 



„ 12- 



„ 29- 



„ 29- 



July 9- 



„ 9- 



„ 15- 



„ 15- 



„ 23- 



„ 23- 



Aug. 1- 



„ 1- 



Life-boat Slip ... 

 Port Erin Bay 

 Rowing-boat) 



Summer 1913. 

 3-2 



(Middle of, 



3-3 



Spring 1914. 



Life-boat Slip 



Life-boat Slip 



Outside Port Erin Bay (mid- 

 way between Breakwater 

 and Bradda Head) 



Life-boat Slip 



Breakwater 



1-9 

 31 



2-5 



2-8 

 2-4 



21-3 



22-8 



21-7 



22-8 

 220 

 21-9 



Summer 1914. 



Life-boat Slip 

 Breakwater ... 

 Life- boat Slip 

 Breakwater ... 

 Life-boat Slip 

 Breakwater .., 

 Life- boat Slip 

 Breakwater ... 

 Life-boat Slip 

 Breakwater ... 

 Life-boat Slip 

 Breakwater ... 

 Life- boat Slip 

 Breakwater ... 



2-2 



22-2 



24-4 



21 



22-3 



24-4 



1-9 



23-0 



24-9 



1-8 



231 



24-9 



2-0 



231 



251 



21 



22-3 



24-4 



2-2 



22-6 



24-8 



21 



22-4 



24-5 



2-6 



21-8 



24-4 



1-9 



22-6 



24-5 



1-85 



21-55 



23-4 



1-8 



22-4 



24-2 



1-8 



22-7 



24-5 



1-75 



22-65 



24-4 



Jan. 



1 — Life-boat Slip 

 1 — Breakwater ... 



Winter 1914-15. 



0-3 



0-8 



24-5 

 251 



24-8 



25-3 

 24-8 

 24-3 



The third column of figures in the table above is obtained 

 by subtracting the " phenol-phthalein " figure from the 

 " methyl-orange " figure (since both titrations are in the same 

 direction), and indicates the number of c.c. of N/100 acid or 

 alkali necessary to bring 100 c.c. of sea- water from the neutral 

 point to phenol-phthalein to the neutral point to methyl-orange or 

 vice versa. The neutral point to phenol-phthalein corresponds 



