62 New Australian Plants. 



temperature with great facility, and without withdrawing his 

 attention from his instrument. It is presumed that the water 

 and the outer edge of the gold cup will be of the same 

 temperature ; for after the liquids at different temperatures 

 have passed through, and over the copper vessel, C, they 

 will be well mixed before acting on the bulb of the ther- 

 mometer, or the edge of the cup. 



By the stopcock y the water, if it be too cold or too hot, 

 can be easily run off into a waste cup. 



By this arrangement, though I have not yet proved it by 

 actual observation, it is believed that the dew point can 

 be obtained with minute accuracy, say within 010°. 



The instrument is easily portable. All the parts can be 

 unscrewed and packed away ; and it does not render neces- 

 sary the use of a liquid like ether, which is very difficult to 

 carry, and which wastes and deteriorates rapidly during the 

 summer in this country. 



Akt. X. — Account of some New Australian Plants. By 

 Dr. Ferdinand Muellee. 



[Bead before the Institute, 5th August, 1857.] 



Mr. President and Gentlemen — It is not without 

 hesitation that I submit to the Institute a limited number of 

 plants, which have, perhaps, no other claims on your attention 

 but their novelty ; and I should have retained them for pub- 

 lication in a Phytological Journal, but for a desire of recog- 

 nizing publicly in Australia the recent contributions of some 

 scientific friends towards our knowledge of the indigenous 

 vegetation. It offers, however, likewise, the opportunity to 

 show how much the wonderful works of Nature remain to 

 be revealed in our own country. 



Some of the plants which I have the honor to exhibit are 

 selected from a Herbarium formed by Mr. Hill, the Super- 

 intendent of the Brisbane Botanic Gardens, a gentleman of 

 keen observation, and great ardour for botanical research. 

 Others were communicated by Mr. Charles Stuart, who suc- 

 ceeded last season in forcing his way into the wilderness of 

 Mount Laperouse, in South-western Tasmania, and through 

 whose exertions new features of its alpine flora have been 

 unveiled. Others of these plants were discovered during a 

 journey through the Grampians, performed by my zealous 



