466 Intelligence and Miscellaneous Articles. 



"a 



change in it. It appeared to be perfectly similar to distilled water. 

 Lime and barytes water were the only reagents with which this li- 

 quor became slightly cloudy, and after standing some hours they 

 occasioned a slight deposit, soluble in nitric acid. The same ap- 

 paratus, placed at the same distance from the sea when it was 

 rough, condensed a liquor, which produced, with the following re- 

 agents, the annexed effects : 



1. Nitrate of silver. An opalescent tint, which, on standing some 

 hours, formed a light precipitate, possessing the characters of chlo- 

 ride of silver. 



2. Protonitrate of mercury. White flocks which precipitated to 

 the bottom of the vessel. 



3. Barytes and lime-water. Turbidness, and eventually a pre- 

 cipitate soluble in nitric acid. 



4?. Litmus-paper. No change of tint. 



5. Muriate and nitrate of barytes, ammonia, solution of potash, 

 subacetate of lead, oxalic acid, and oxalate of ammonia, produced 

 no appreciable effect. 



During a calm season, but when the sea was rough, the fluid ob- 

 tained by means of the same balloon, at the distance of about 50 

 feet, gave no precipitates with the fore-mentioned reagents ; but 

 when the wind blew from the sea towards the balloon, the liquid 

 gave more or less of precipitates with them. 



The same experiment was repeated on the sea, during a calm 

 period. The balloon was suspended four feet from the surface, in a 

 vessel at one hundred paces from the shore. The condensed liquor 

 evaporated to one third of its bulk, produced no effect upon the 

 above mentioned reagents. 



M. Roubaudi then, with some variation in the mode of making 

 the experiment, attempted to determine the extent to which the 

 saline particles of the sea are carried from the shore ; and from va- 

 rious experiments he concluded: 



1st. That the air on the sea-shore, and over the sea, contains 

 neither muriatic acid nor muriates. 



2nd. That when the sea is rough, and especially when the wind 

 is violent, particles of sea- water, in a state of great tenuity, float in 

 the air, especially on the shore where the waves break ; and that 

 these particles are carried to greater or less distances according to 

 the violence of the wind and the degree to which the sea is agitated. 



3rd. That without attempting to determine the distance with 

 great precision, it may be admitted, that at Nice, where the south 

 wind is seldom violent, the saline particles are rarely carried more 

 than 100 paces inland. — Journal de Pharmacies Nov. 1833. 



HYDROGRAPHIC PAPER. 



M. Chevallier has examined a paper lately introduced, which 

 may be written on with a pen dipt in water. He found that it 

 was prepared by soaking the sheets of paper in a solution of sul- 

 phate of iron, drying, and then covering them with finely pow- 

 dered galls. M. Chevallier states that similar papers may be pre- 

 pared by using other solutions and powders ; — thus blue is pro- 



