|| ( ; MMAR1 ■'' CURRENT RESEARCHES RELATING TO 



Mounting' Arthropoda in Amann's Chloralphenol.* — M. Langeron 

 calls attention to chloralplienol, one of the media devised by J. Amann 

 f or mounting vegetable preparations.! The writer finds that this medium 

 is very effective for preparing and mounting Arthropoda, as it not only 

 softens the chitinous investmeni but at the same time clears up and 

 dehydrates the specimen. The manipulation is extremely easy; the 

 i n8( killed by immersion in hoi 7" alcohol ; theyarethen treated 



with the chloralphenol, which may be renewed once, and when sufficiently 

 dehydrated are removed to xylol balsam. The only preparations which 

 failed were those of insects gorged with blood. 



(6) Miscellaneous. 



New Forceps. i — M. Morosoff describes a forceps which he uses for 

 picking up cover-glasses and slides. He has found them especially useful 

 when dealing with highly infective material, such as plague, glanders, etc. 

 The chief feature of the instrument is the grooved fangs. 



Film Test for Crude Rubber.§ — C. P. Fox, after examining 33 com- 

 mercial brands of crude rubber belonging to ten distinct groups, failed 

 to find any indication pointing towards a definite film peculiar to any 

 particular brand of rubber. The experiments were undertaken in order 

 to confirm or refute the observations of J. Torrey, who found that when 

 .". min. of crude rubber were dissolved in 100 cam. of petroleum naphtha, 

 \ drops allowed to evaporate on a white surface gave characteristic 

 figures. If Torrey's view was correct then any crude rubber could !"■ 

 identified : unfortunately his observations are not confirmed. 



Metallography, etc. 



Nickel-sulphur System. || — K. Bornemann has made a further ther- 

 mal and microscopical study of this system in the range 0-30 p.c. 

 sulphur, and finds that his earlier equilibrium diagram can be simplified 

 by the replacement of two series of nickel-rich mixed crystals by one 

 Errors in the earlier determinations appear to have been due to 

 supercooling of the melts. 



Tellurides of Sodium and of Silver. f— G-. Pellini and E. Quercigh 

 have made a thermal study of the sodium-tellurium system and the 

 silver-tellurium system. The compounds found are Xa./Te, Na 3 Te.,. 

 X.i 'IV.. AgTe, and Ag,Te. 



Tellurium Alloys.** -M. Kobayashi has determined the equilibrium 

 diagrams of the tellurium-cadmium and tellurium-tin systems. One 

 compound, having a high melting point, exists in each system. TeCd 



* C.B Soc. Biol. Paris, lxx. (1911) pp. 457-9. 



this Journal, 1- L2, sections (1) and (4). 



I Centralis. Bakt., lte Abt. Orig., hi. (1910) pp. 191-2 (3 figs.). 

 1 Ihio Naturalist, x. ( 1910) pp. 146-8. 

 M< ballurgie, vii. (1910) pp. 667-74 (6 figs.). 



* ii R. Accad. Lincei, xix. (1910) pp. 350-56, 415-21, through -Journ Chem. 

 x.-viii. (1910) pp. 1062-3. 



hem., lxix. (1910) pp. 1-9 (9 figs.). 



