Report of the Progress of the Sciences in France. 27 



fluids, such as water, oil, &;c. We shall make known the addi- 

 tions which have been made this year to our stock of knowledge 

 on this subject. Bremontier has published some interesting 

 observations on the movement of waves. 



Rhuland has made some new experiments on the radiation of 

 heat : he iias proved (hat the more caloric is lost by lodies by 

 radiation, the more the surrounding bodies are obliged to give 

 up to them their proper heat, in order to re-establish the equi- 

 librium of heat. (Journal de Physique, Nov. 1813.) 



It appears to me that we may conclude that there is thus 

 established a double movement of caloric : viz. a caloric effluent 

 from warm bodies, and a caloric afluent from bodies less warm. 



The greatest heat ever producd has been obtained by Sir 

 Humphry Davy, by means of the Galvanic battery of the Royal 

 Institution. (Here follows a description of the apparatus and 

 experiments, which are familiar to oiu" readers.) 



Configliati, by repeating the experiments of Leslie upon arti- 

 ficial cold, has obtained t,ome very curious results^, and succeeded 

 in freezing mercury. 



CHEMISTRY. 



Under this head M. Delametherie passes a just eulogium on 

 the recent labours of Sir Humphry Davy and Berzelius, of whose 

 improvements he gives a full analysis. 



He then notices the labours of the French chemists. Bouillon 

 Lagrange and Vogel have furnished a new analysis of different 

 khids of sea-water; viz. from the Mediterranean, at Marseilles, 

 and the Ocean at Bayonne and Havre. 



One thousand grains of sea-water from Havre yielded: 



Grains. 

 Of Saline matter obtained by evaporation .. 36- 



Carbonic acid 0*23 



Muriate of soda 25-10 



Muriate of magnesia 3'.50 



Sulphate of magnesia 5"78 



Carbonate of lime and magnesia 0'20 



Sulphate of lime 0* 15 



One thousand grains of sea-water from Bayonne afforded : 



Of Saline matter by evaporation 38- 



Carljonic acid ^^'23 



Muriate of soda 25-10 



Muriate of magnesia 3-50 



Sulphate of magnesia 5-7o 



Carbonate of lime and magnesia 0*20 



{Sulphate of lime ^'X'^ 



^ Oiie 



