of the Fishery Board for Scotland. 
387 
TABLE XY. — Mean Monthly Specific Gravity and Calculated 
Salinity at Abertay Light Vessel. 
Month. 
9 A.M. 
3 P.M. 
Surface. 
4 fathoms. 
Bottom. 
Surface. 
4 fathoms. 
Bottom. 
Sp. Gr. 
Sal. 
Sp. Gr. 
Sal. 
Sp. Gr. 
Sal. 
Sp. Gr. 
Sal. 
Sp. Gr. 
Sal. 
Sp. Gr. 
Sal. 
1889. 
June 
24-9 
3 15 
25-2 
3-21 
25-6 
3-28 
24-4 
3-07 
24-9 
3 16 
25-4 
3-24 
July 
25-8 
3-31 
25-9 
3-32 
26-0 
3-34 
25-9 
3-33 
26 1 
3-36 
26-2 
3-38 
August 
25 '0 
3 '17 
25*4 
3 "24 
25 '6 
3*27 
25*4 
o io 
26*0 
26*2 
3 '39 
September 
24-6 
3-10 
25-0 
317 
25-3 
3-24 
25-5 
3-26 
25-2 
3-30 
25-9 
3-32 
October 
24-3 
3-04 
24-5 
3-09 
24-8 
3-15 
25 1 
3-20 
25-4 
3-24 
25-6 
3-27 
November 
23-9 
2-98 
24-6 
3-09 
25-1 
318 
25-0 
3 18 
25-5 
3-26 
25-7 
3 29 
December 
24-0 
3 00 
24-5 
3-09 
24-9 
3-15 
24-5 
3-08 
25-2 
3-22 
25-5 
3-25 
1890. 
January 
22-4 
2-72 
23-5 
2-92 
24-5 
3-09 
22-2 
2-68 
24-3 
3 04 
25-1 
3-20 
February 
22-9 
2-81 
24-0 
2-98 
24-2 
3-05 
24-0 
3-00 
24-8 
3-14 
24-8 
3 14 
March 
23 0 
2-82 
23-9 
2-99 
24-4 
3-06 
23-5 
2-92 
24-8 
3-14 
25-2 
3-21 
April 
24 1 
3-02 
24-5 
3 09 
24-9 
3 15 
24-7 
3 12 
25 1 
3-20 
25-2 
3-21 
May 
24-2 
3-03 
24-5 
3-09 
24-8 
314 
24-7 
3 12 
25-1 
3-20 
25-2 
3-21 
June 
24-2 
3-03 
24-6 
3 11 
24-9 
3 15 
24-5 
3-09 
24-9 
3 17 
25-2 
3-21 
July 
24 1 
3-02 
24-6 
3-09 
24-9 
3 15 
24-7 
3 12 
25 1 
3-20 
25-2 
3-21 
August 
24-3 
8 05 
24-8 
3-15 
25-0 
3-19 
25-2 
3-21 
25-4 
3-25 
25-6 
3-28 
September 
24-9 
3-15 
25 1 
3-18 
25-3 
3-22 
24-9 
3 17 
25-4 
3-25 
25-6 
3-28 
October 
23-5 
2-90 
24-1 
3-02 
24-5 
3-09 
23-8 
2-96 
25-0 
3 17 
25-2 
3-21 
November 
20-8 
2-44 
22-4 
2-70 
23-0 
2-83 
23-5 
2-92 
24-4 
3-07 
24-8 
313 
December 
23-1 
2-83 
23-7 
2-95 
24-2 
3-03 
24-0 
2-99 
24-4 
3-07 
24-7 
3 11 
1891. 
January 
24-3 
3-05 
24-5 
3-09 
24-6 
310 
24-7 
3-12 
24-8 
3-14 
24-9 
317 
February 
23-5 
2-89 
24-1 
3-02 
24-3 
3-06 
23-8 
2-96 
24-7 
3 12 
25-0 
3 18 
March 
23-8 
2-96 
24-2 
3-04 
24-4 
3 07 
24-3 
3-05 
24-8 
3 15 
25-0 
3-18 
