300 Miscellaneous Intelligence. 



2. Diving Machine. — A new diving machine, called a Dolphin, 

 has been invented by M. F. Farkas, an Hungarian. The conti- 

 nental papers have described some of the advantages of the in- 

 strument, but not its construction. An experiment was made 

 with it at Vienna in the military swimming-school at the Prater. 

 Count Joseph Esterhazy de Galanthy, Count Fergas de Ghymes, 

 the acting Chamberlain Nemes Slagod, and several Englishmen 

 and persons of distinction were present. The servant of the in- 

 ventor plunged with the Dolphin in twenty-four feet water, and 

 walked upon the bottom over the whole square of the swimming- 

 school. To prove that there could be no want of light, the 

 inventor sent down a lantern, and when it was taken up again 

 the light was still burning. After the man had remained one 

 hour under water, he returned to the surface without assistance ; 

 not because he wanted air, but because all who were present 

 were satisfied with the success of the experiment, and directed 

 that the man might ascend. 



3. Astronomical Prize Questioyi. — The Astronomical Society 

 of London have offered their gold medal and twenty guineas 

 " For the best paper on the theory of the motions and pertur- 

 bation of the satellites of Saturn. The investigation to be so 

 conducted as to take expressly into consideration the influence 

 of the rings and the figure of the planet as modified by the at- 

 traction of the rings on the motions of the satellites : to furnish 

 formula adapted to the determination of the elements of their 

 orbits and the constant co-efficients of their periodical and 

 secular equations from observation : likewise to point out the 

 observations best adapted to lead to a knowledge of such 

 determination. The papers to be sent to the Society on or before 

 February 1, 1823." 



Each memoir is to bear a motto and be accompanied by a 

 sealed paper with the same motto and the author's name. The 

 successful paper is to be left with the society, and published as 

 they may direct. 



