I 



of the Fishery Board for Scotland. 417 



years show (winter 5 - 0, summer 7 - 0) ; and also the maximum and 

 minimum tell. 



The mean transparencies have been calculated for each half-year, and 

 are tabulated below : — 



Mean Transparency of Water of Firth of Forth during the four 

 half-years 1891-92. 























1892. 









1891. 





Station. 



West End of Station. 



East End of Station. 



West End of Station. 



East End of Station. 







Low 

 Sun. 



High 

 Sun. 



Mean. 



Loi 

 Sui 



JV 



l. 



High 

 Sun 





lean. 



Low- 

 Sun. 



High 

 Sun. 



Mean. 



Low 

 Sun. 



High 

 Sun. 



Mean. 



I. 

 II 

 III 



IV 

 V. 

 VI 





2 

 2 

 2 

 1 



3 



•4 

 •9 

 5 

 7 

 8 

 4 



2- 9 



3- 8 

 3-4 

 23 

 5-5 

 5 2 



2-6 



3 3 

 2-9 

 20 

 46 



4 2 



2-8 

 3 4 

 22 

 2-0 

 4-1 

 3 3 





4- 2 

 43 

 3 0 

 2 6 



5- 8 





3 5 



3- 8 

 2-6 

 2-3 



4- 8 

 4-4 



22 

 2-8 

 25 

 19 

 4 5 

 36 



2-8 



4- 2 

 3 0 

 2-4 

 6 4 



5- 0 



2- 5 



3- 5 

 2-8 

 2-2 

 53 



4- 2 



3-2 

 2-8 

 2-8 



2- 0 

 51 



3- 9 



41 



3 9 

 3-8 

 3-0 

 G-6 



5-8 



37 

 3 4 

 33 

 2-5 

 5-7 

 4^8 • 



VII. 

 VIII. 

 IX. 



X. 



2 

 3 

 5 

 0 



3 

 •8 

 2 

 6 



4-0 



6- 6 



7- 9 

 0-7 



31 

 5 1 

 C-5 

 0-7 



2-9 

 4-8 

 G-4 

 0-6 



4 6 



7- 8 



8- 5 

 07 





37 

 6 1 



0-7 



2-9 

 41 

 CO 



3-9 

 5-0 

 7 1 



3 4 

 4-6 



GG 



3-5 

 5-9 

 G-2 



4-2 

 6-2 



6 9 



3-8 

 6 0 

 G-6 



The maximum and minimum readings for the same periods are collected 

 in the following tables : — 



Transparency of the Water in the Firth of Forth. 

 Maxima and Minima for four half-years, 1891-92. 







1892. 



Stalion. 



West End of Station. 





East End of Station. 



Low Sun. 



High Sun. 





Low Sun. 



High Sun. 



























Max. 



Min. 



Max. 



Min. 



I 



[ax. 



Min. 



Max. 



Min. 



] 



[. 



3'2 



1-5 



3-5 



2 5 



I 



i-5 



2-0 



6-0 



3 5 



II. 



4-0 



1-5 



4 0 



3 0 





>-o 



2-0 



5-5 



2-8 



III. 



3-0 



2-0 



5 0 



2-5 





•8 



2-0 



3-5 



2-5 : 



IV. 



2-0 



1-5 



3-0 



1-5 





i-0 



1-5 



3 0 



1-8 



V. 



5-0 



2-0 



7-0 



3-0 





)-0 



3-5 



7-0 



3*0 



VI. 



5-0 



1-8 



7-0 



4-5 





>-o 



1-8 



7-0 



3-0 



VII. 



30 



15 



4-5 



3-0 



40 



2-0 



5-5 



3 5 



VIII. 



60 



3-0 



9-0 



4-5 



6-8 



3 0 



9 0 



6 0 



IX. 



7-0 



3-5 



90 



6-5 



8-0 



4-5 



9-5 



7-0 



X. 



0-8 



0 5 



10 



05 



0 8 



0 5 



10 



0-5 



