of Edinburgh, Session 1884 - 85 . 57 
liigh water, showing the effect of evaporation to be greater than that 
due to springs. 
On the 30th December the density was ascertained at several 
points at the time of high water, with the result that near a spring 
which falls into the quarry it was a little lower than at the entrance 
on the surface, and distinctly lower than at the bottom of the quarry, 
while half a mile outside in the firth the water was salter than near 
the shore (Table X.): — 
Table X. 
Position. 
Depth. 
Depth of 
Sample. 
Density 
at 15° -56. 
Temperature 
of Water. 
Close to spring, . 
1 fathom. 
Surface. 
1-02372 
39° "2 Falir. 
At “Ark,” 
fathoms. 
Bottom. 
1-02393 
39°-3 „ 
N.W. buoy in quarry, 
8 fathoms. 
Bottom. 
1-02392 
39°-4 „ 
Quarry entrance, 
1J fathom. 
Surface. 
1-02382 
39°-3 „ 
Half a mile outside ) . 
3| fathoms. 
Surface. 
1 -02436 
40°-7 
Due north, . ) . 
3^ fathoms. 
Bottom. 
1-02449 
o 
The figures for all the quarry observations are given in Table XI. 
Table XI. 
Date. 
No. of 
Sample. 
Weather. 
Water. 
Tide. 
Density at 
15° -56. 
Alkal- 
inity. 
July 29. 
37 
Dull— Pine. 
Clear. 
High Water. 
1 1-02454 
„ 30. 
38 
,, 
Muddy. 
469 
„ 31. 
39 
it 
469 
Aug. 1. 
44 
443 
„ 1. 
45 
Sunny, Wind E. 
Low Water. 
455 
„ 2. 
46 
Sunny, high W. 
Very muddy 
High Water. 
463 
„ 4. 
48 
Clear, W. 
Clear. 
Low Water. 
440 
„ 5. 
49 
Bright. 
Muddy. 
High Water. 
459 
„ 5. 
50 
Sunny, S.W. 
442 
„ 6. 
51 
Bright, S. 
Clear. 
Low Water. 
435 
„ 7. 
52 
Sunny, N.E. 
,, 
471 
„ 8. 
53 
Mist, N.E. 
Muddy. 
470 
„ 8. 
54 
Clear, N.E. 
High Water. 
468 
„ 9. 
55 
Cloudy, E. 
Low Water. 
469 
„ 9. 
56 
Sunny, Calm. 
Muddy. 
High Water. 
492 
,, 11. 
57 
Very muddy 
Low Water. 
468 
„ 12. 
58 
Thunder and Bain. 
405 
„ 13. 
60 
Sunny, S.E. 
High Water. 
478 
„ 13. 
61 
464 
„ 14. 
62 
Fine, S. 
Muddy. 
Low Water. 
474 
„ 15. 
64 
Clouds, Bain. 
High Water. 
480 
„ 16. 
65 
Strong W. 
466 
„ 18. 
66 
Clear, Calm. 
470 
„ 21. 
67 
N.E. gale. 
496 
Sept. 1. 
78 
Calm. 
Clear. 
Low Water. 
379 
„ 1 . 
79 
” 
378 
