THE PRECIPITATION OF CALCIUM CARBONATE IN THE SEA. 515 



HYDEOGRAPHIC OBSERVATIONS IN THE TONGUE OF 



THE OCEAN. 



The samples of water taken for hydrographic observations were 

 analysed by Mr. D. J. Matthews at Plymouth. With great kindness 

 he calculated the results, and from his notes the following observations 

 and conclusions are drawn. 



The samples were analysed for salinity in comparison with the 

 standard sea-water supplied by the Central Laboratory of the Conseil 

 International pour I'Exploration de la Mer, and hence the results 

 are strictly comparable with all other analyses published under the 

 auspices of this International Council. 



At the first station, 6 miles east of Golding Cay, the following 

 results were obtained : — 



Note. — The original surface sample was lost owing to breakage of the bottle in 

 transit to England. The analysis was made on a sample taken three days later at the 

 same spot. 



In this table CI %„ means the weight of Chlorine in grammes found in 1000 grammes of 

 sea-water. S%„ means the salinity, or the total weight of salt in grammes found in 

 1000 grammes of sea-water. Co represents the specific gravity of the sample at 0° C, 

 and o-t represents the specific gravity of the sample at the temperature "t" at which 

 it was collected, with no correction for pressure. 



At the second station, 13| miles east of Golding Cay, the following 

 results were obtained : — 



