76 Papers from the Marine Biological Laboratory at Tortugas. 



Table 3. — Composition of Drainage from the Florida Everglades} 

 [Milligrams per liter.] 



Total solids at 180° C 



Total solids at dull red heat. 

 Organic and volatile matter. 



Silica (SiOj) 



Iron (Fe) 



Calcium (Ca) 



Magnesium (Mg) 



Sodium (Na) 



Potassium (K) 



Carbonate radicle (CO3) 



Bicarbonate radicle (HCO3). 



Sulphate radicle (SOi) 



Chlorine (CI) 



Nitrate radicle (NO3) 



Color 



North New 

 River Canal, 



at lock 6 

 miles above 



Fort 

 Lauderdale. 



130 

 126 



4 



8.2 

 •03 

 26 



6.7 

 19 



2.0 

 .0 

 94 



4.1 

 26 



Lake Okee- 

 chobee, 3 



miles north 

 of Ritta 

 Island. 



183 

 143 

 40 

 8.2 

 .03 

 31 

 7.0 

 16 

 2.0 

 4.8 

 104 

 7.3 

 28 



.1 



41 



I Samples collected in June 1913, by R. B. Dole; analyzed by W. T. Read. 

 TESTS OF BAY WATERS. 



Samples were collected in or just outside Biscayne Bay at the points 

 shown on the accompanying map and the chemical tests of them are re- 

 corded in table 4. 



Table 4. — Some Chemical Characteristics of Sea-Water Around Biscayne Bay, Florida. 

 [Samples collected June 23, 1913. by R. B. Dole; analyses by E. C. Bain.] 



No. 



Location. 



Mouth Miami River inside bar near 

 Royal Palm dock 



i.S miles east of Miami at 1 1 ft. depth 

 in government channel north of 

 Virginia Key 



Off Cormorant Point (tide ebbing) ... 



I mile west of west point of Key Bis- 

 cayne near inside P & O marker ... 



0.2S mile west of Old Man Beacon ... 



3 miles northeast of Black Ledge 



0.5 mile west of Soldier Key 



In channel through Featherbed Bank 



1.5 miles west of Fowey Rocks Light, 

 outside bay 



In channel south of Key Biscayne and 

 o.s mile south of Old Florida Cape 

 Light, outside bay 



At red buoy outside bar across en- 

 trance to Bear Cut, a mile south- 

 east of Virginia Key; outside bay... 



Temp. 



of 

 water. 



Time. 



SO-P 5 



'C. 



26.3 t 4'»30"' a.m. 



26.6 



27.2 

 26.0 

 27.3 

 27.0 

 26.4 



26.9 



2 00 p.m. 



4 45 a.m. 



5 30 



6 00 



7 00 

 9 00 



8 00 



II 00 



to i 



•3 '3 



(J CO 



Grams per kilogram. 



27.2 IX 45 



I 



27.7 I 15 p.m. 



26.62 

 24.13 



30.35 



33.95 

 36.73 

 36.64 



35.82 



DETERMINED AND CALCULATED DENSITIES. 



No particular importance can be given to the relatively slight differences 

 between the determined and calculated densities, especially in view of the 

 absence of several duplicate determinations on each sample. On the other 

 hand, the fairly close agreement of the estimates indicates that the density 

 of sea-water, even when largely diluted by river water, may be used in 



