HITHERTO UNDESCRIBED PLANTS FROM ARNHEIm's IAND. 129 



calyx-tube ; fruit ellipsoid, much attenuated at the very summit. 

 Height about 2 feet. Root not obtained. Larger leaves extend- 

 ing well up on the stem, to 6 inches long, to \ inch broad. Spike 

 measuring about 3 inches in length. Fowers numerous, but 

 crowded. Lowest bracts to f inch long. Lobes of the calyx 

 hardly exceeding \ inch in length. Ripe fruit nearly \ inch long. 



Seeds brownish, almost cylindric, at the nucleus slightly turgid, 

 somewhat twisted and streaked ■ the testule membranously pro- 

 tracted at both extremities, truncate at the one, accuminate at 

 the other ; whole length about \ mm. 



The aspect is quite different from that of any other Australian 

 species. In some respects it approaches however H. elongata, but 

 the labellum is more than that of H. xanthantha. 



As regards extra- Australian species our new one merges towards 

 the group containing H. linguella, H. acuifera and H. densa. 

 H. elongata according to Mr. O'Shannesy, has green flowers ■ Mr. 

 Holtze found them greenish- yellow, and mentions that the flowers 

 of H. graminea are flesh-coloured and fragrant ; the variety Am- 

 hemica he notes as having greenish-yellow flowers. 



SOME APPLICATIONS OF THE RESULTS OF TESTING 

 AUSTRALIAN TIMBERS TO THE DESIGN AND ■ 

 CONSTRUCTION OF TIMBER STRUCTURES. 



By W. H. Warren, m. inst. c.e., M.Am. soc. c.E.,Wh. Sc, Challis Professor 

 of Civil and Mechanical Engineering at the University of Sydney. 



[With Nine Diagrams.] 



[Read before the Royal Society of N.S.W., September 3, 1890.~] 



The strength and elasticity of all the important Australian 

 timbers having been determined by the author, it is proposed to 

 illustrate the methods of applying the results of testing to the 

 design and construction of timber structures. 



In the experiments on beams of Australian timber failure 

 occurred generally from the crushing of the fibres on the concave 

 side of the beam, followed immediately by the tearing of the fibres 



I— September 3, 1890. 



