362 
Dr Marcet’s Experiments- 07i Sea- Water. 
Synthetic View of the Results obtained fi'om the Analysis of different Seas; 
the Quantity of Water operated upon being supposed to be 500 Gi'ains. 
Description of 
the Specimens. 
Specific 
Gravity. 
Residue of 
Evaporation of 
500 grs. water 
1 Muriate of 
j Silver. 
Sulphate of 
Barytes. 
Oxalate of 
Lime. 
Phosphate of 
Magnesia. 
Total of-Preci- 
pitates from 
500 grs. water. 
Observations. 
Arctic Ocean. 
Spec. 1. 
1027.27 
Grains. 
19.5 
Grs. 
39.7 
Grs. 
3.3 
Grs. 
0.85 
Grs. 
2.1 
Grains. 
46.55 
The quantity actually ope- 
rated upon was 500 grs. 
Arctic Ocean. 
Spec. 12. 
1019.7 
14.15 
27.9 
2.4 
0.7 
1.8 
32.8 
From surface. Quaritity o- 
perated upon 500 grs. 
Arctic Ocean. 
Spec. 67. 
1002.35 
1.75 
3.2 
0.1 
0.05 
0.03 
3.37 
Sea ice water ; coast of Spitz- 
bergen. Opd. on 500 gi-s. 
Arctic Ocean. 
Spec. 14. 
1027.05 
19.3 
38.9 
3.25 
0.95 
2.9 
46. 
From a depth. Operated 
on 500 grains. 
Equator. 
Spec. 35. 
1027.85 
19.6 
40.3 
3.7 
0.9 
3.1 
48. 
From surface. Operated 
on 500 grains. 
S. Atlantic. 
Spec. 41. 
1028.19 
20.6 
40.4 
3.75 
1.0 
3.2 
48.3 
Operated on 250 grains. 
White Sea. 
Sp. 58. & 59. 
1022.55 
16.1 
31.8 
3.0 
0.6 
2.2 
37.6 
Operated on 500 grs., but 
evaporated only 250 grs. 
Black Sea. 
Sp. 56. & 57. 
1014.22 
10.8 
19.6 
1.95 
0.55 
1.5 
23.6 
Operated on 500 grs. for the 
earths; on 250 for mur. of 
silver and evap. of water. 
Baltic. 
Spec. 60. 
1004.9 
3.3 
7. 
0.7 
0.2 
0.6 
8.5 
Operated on 250 grs. The 
precipitates slightly tinged 
by veget. or anim. matter. 
Sea of Mar- 
mora. Surface. 
Spec. 53. 
1020.28 
14.11 
28.4 
2.65 
0.4 
2.35 
33.8 
Entrance of Hellespont. 
Surface. Opd. on 500 grs. 
except for mur. of silver. 
Sea of Mar- 
mora. Bottom. 
Spec. 52. 
1028.19 
21. 
40.4 
3.55 
0.9 
3.2 
48.05 
From bottom. Garb, of lime 
deposited during evap. but 
none from the water at sur- 
face. Operated on 500 grs. 
Middle of . 
N. Atlantic. 
Spec. 27. 
1028.86 
21.3 
42. 
3.85 
0.8 
2.7 
49.35 
Operated on 250 grs. for 
evap. of water and mur. of 
silver. 500 for other salts. 
Yellow Sea. 
Spec. 48. 
1022.91 
16.1 
32.9 
i.3i 
0.75 
2.2 
37.2 
During concentration de- 
posited carbon, of lime. 
The water was yellowish, 
and had a strong hepatic 
smeU. ' Operated on 500 
grs. 
Mediterranean. 
Spec. 51. 
1027.3 
m.T 
38.5 
3.6 
0.8 
•3.0 
45.9 
From Marseilles, and ra- 
ther weak, from vicinity of 
rivers. Opd. on 100 grs. 
for evap. and mur. of silver; 
and 250 for other salts. 
Dead Sea. 
1211. 
192.5 
326.4 
0.5 
9.78 
55.5 
584.68 
Phil. Trans. 1807. 
Lake Ourmia, 
in Persia. 
1165.07 
111.5 
237.5 
66.0 
0. 
10.5 
425.5 
Spec, brought by Brown* 
Operated on 100 & 50 grs* 
