On Enhydros found at Beechworth. 71 



rj Argus. — The Great Nebula about rj Argus was first 

 observed by the Great Telescope on 27 Dec. last, and I then 

 note : — " Evident changes in 77 nebula since Le Sueur's 

 sketches, and I notice a small bright duplicate nebulosity, 

 s .f. r}, like a small nebulous double star. It is too bright to 

 have escaped previous notice, and is not noted by Le Sueur." 



Subsequent observation has corroborated this statement, 

 and it is now beyond a doubt, that the enormous physical 

 changes are still taking place, particularly about the 

 lemniscate, and suspected also in the star 77 itself. But 

 these changes may form the subject of a future paper, and 

 could be best illustrated by a reference to the sketches made 

 at successive periods by Mr. Le Sueur and myself — 

 comparing also with the drawing executed by Sir John 

 Herschel. 



Some observations on Jupiter and Saturn, also, may on a 

 future occasion be worthy of your notice, as also, some on 

 the nebula about 6 Orionis and others. 



Aet. XXII. — Notes on Enhydros found at BeecJnvorth. 

 By Geo. Foord, Esq. 



[Read April 12, 1871.] 



The great mineralogical interest attaching to the curious 

 natural productions called " Enhydros " or " water stones," 

 and the mode of their formation remaining, in many essen- 

 tial particulars, without any adequate explanation, are 

 circumstances which have induced me to believe that anj'' 

 contribution to the knowledge of them, however slight, 

 would prove acceptable, and therefore I offer the following 

 brief note on the subject to your Society. 



The sample, the subject of experiment, was a large 

 specimen, weighing over 900 grains, having for its largest 

 section a form closely approaching an equilateral triangle, 

 measuring a little over two inches on each of the sides. 

 For this specimen I am indebted to the kindness of 

 Mr. George H. F. Ulrich. It was, I am informed, obtained 

 from the same site as those described by Mr. Dunn, and 

 it possessed the usual characteristics. The specimen 

 clearly included two separate chambers ; in fact, dur- 

 ing the course of experiment it was cloven into 

 two separate water stones, of pretty nearly equal diinen- 



