418 



Part III. — Eleventh Annual Report 





1891. 



Station. 



West End of Station. 



East End of Station. 



Low Sun. 



High Sun. 



Low Sun. 



High Sun. 





Max. 



Min. 



Max. 



Min. 



Max. 



Min. 



Max. 



Min. 























I. 



3'0 



2'0 



4-( 



» 



1*6 



4'5 



2 "5 



7 - 0 



2 - 8 



11. 

 III. 



IV. 



3 5 

 3-5 

 2-8 



20 

 2-0 

 10 



7C 

 4C 



3( 





30 

 Mj 

 2-0 



32 



2 5 

 20 

 1-8 



6 5 

 5 0 

 4-5 



3-0 



► 

 > 



3-5 

 2-5 



15 



20 



V. 

 VI. 

 VII. 

 VIII. 

 IX. 



X. 



60 

 4-5 

 35 

 50 

 9-0 



32 

 25 

 2 5 

 35 

 4-0 



7-( 

 81 

 5( 

 7( 

 10-( 



) 

 ) 

 ) 

 ) 

 ) 



6-0 

 30 

 2 5 

 30 

 3-8 



6-0 

 5 0 

 5-5 

 90 

 95 



30 

 2-8 

 2 5 

 40 



28 



7-5 



7- 0 

 5-5 



8- 0 

 90 



60 

 50 

 2 0 

 3-5 

 35 



These tables show that the observations for 1889-90 discussed in the 

 Ninth Annual Report gave results relatively constant, since the means for 

 1891-92 lead to the same conclusions, although they differ a little in their 

 value. 



The means of the four years' observations at our disposal have been 

 calculated, and fully bear this out. 



The following table shows — 



Mean Transparency of the Water in the Firth of Forth for four 

 years 1889-92. 



Station 



ii 



II. 



III. 



IV. 



V. 



VI. 



VII. 



VIII. 



IX. 























Low Sun, Half- Year. 



21 



2 7 















3 6 

 47 



5 0 

 5 4 



West End of Station, 



2 7 

 2-S 



2 2 

 2 2 



17 

 1-9 



4-0 

 42 



31 

 31 



2 3 



3 0 



East End of Station, 



High Sun, Half- Year. 



West End of Station, 



2-6 



3-6 



2-8 



22 



53 



46 



3 3 



4-8 



7-0 



East End of Station, 



3-8 



3-8 



2-9 



2-4 



5-4 



4 9 



4-0 



6-4 



7 1 



Year. 





















West End of Station, 



2 4 



3 2 



2 5 



2 0 



4*6 



3 8 



2-8 



4 2 



60 



East End of Station, 



32 



33 



2 6 



2 2 



* 



4 0 



3 5 



,6 



68 



The Stations may again be grouped into Central, Northern, and Southern, 

 and the mean transparencies for four years be arranged in order, 

 passing from the Stations further west to those at the mouth of the 

 Forth :— 



