

290 Miscella?ieous Intelligence. 



separate after exhaustion, by fixing the pin K, to the lever C. The 

 surface of the top of the vase D, is formed of fine corrugated metal. 

 F is the orifice, where the exhaustion is effected. 



To set the hand of the Aneroid to correspond with any other Barom- 

 eter. — A, the head of the screw, fig. 1, to be considered as at the back 

 of the case. This screw, when screwed or unscrewed, alters the po- 

 sition of the hand, and is not to be touched for any other purpose. It 

 acts in a piece of brass, seen at P,/g. 1, which is prevented from turn- 

 ing round the spring S, by means of a pin inserted in the plate. When 

 the screw A, is turned, it raises, or depresses, the lever C C, whence 

 motion is communicated to the hand. 



To Register the Variations of the Aneroid. — A nut, as seen at 0, 

 Jig. 2, projects through the centre of the glass, to enable the observer 

 to move the gilt index, W, beneath it. By this gilt index, the registra- 

 tion of the hand b, is effected. The gilt hand being placed over the 

 steel one, should the latter have subsequently deviated from W, either 

 to the right or left, the difference will be the result of increased or di- 

 minished atmospheric pressure. Fig. 2, is a representation of the outer 

 case, with a Fahrenheit's thermometer attached. In the Mining Jour- 

 nal, of Feb. 3, Dr. Murray has borne his testimony to the sound scien- 

 tific principles on which this instrument is based, and the vast utility it 

 will prove to the seamen, aeronauts, and those engaged in mountain 

 travelling — indeed, to aerostatic science generally.* 



4. Gold at Port Phillip, South shore of Australia, (Athen., No. 

 1132.) — Newspapers to the 9th inst. have come to hand from Melbourne. j 



The most important intelligence is the following, which we copy from 

 the Argus of the 31st ultimo. — " Port Phillip a Gold Mine ! — We hasten 

 to apprise our readers of the important discovery of an extensive gold 

 field in this province, yielding the virgin metal in such quantities as, to 

 all appearance, will throw California into the shade. The particulars 

 of the discovery, as detailed by one of the parties, are as follows: — A 

 shepherd called some weeks since upon Mr. Brentani with a specimen 

 of metal which he had found in his wanderings, and which immediately 

 struck Mr. Brentani as being fine gold. He applied for a more accu- 

 rate assay to Mr. Duchene, who at once pronounced it a fine specimen 

 of the precious metal. Mr. Duchene proceeded with the shepherd to 

 the spot, in the neighborhood of the Pyrenees, and found indications of 

 the metal in great abundance, and extending over a large space. He re- 

 turned to Melbourne with ore sufficient to yield 100/. worlh of pure 

 gold. He describes the gold as being abundant, and the quality as 

 better than any he has hitherto seen worked. The quantity contained 

 in the mine visited by them was incalculable: — indeed, he says there 

 is a tract of territory at least five miles in extent which furnishes every- 

 where abundant indications of the existence of gold. Mr. Duchene 

 picked up one piece of the metal weighing 2 lb. 3 oz. which contained 

 upwards of 90 per cent, of virgin gold ; in fact, it presented the ap- 

 pearance of a lump of molten gold, interspersed with a few quartz 

 pebbles. We have seen it as picked out of the earth ; and Mr. Duchene 



* We believe that the value of the Aneroid barometer cannot yet be considered 



as fully established.— Eue. . 



