260 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



New Cover-glass Forceps.* — T. J. Davis has invented a forceps for 

 holding cover-glasses whilst staining and decolorising in bacteriological 

 ■work. The material, which is an alloy used by dentists, possesses con- 



Fig. G2. 



siderable elasticity and is not damaged by dilute acids. The shape of 

 the instrument is shown in the illustrations (figs. 62 and 63), and from 

 these it will be seen that when A and B are compressed C and D open 

 to receive the cover-glass, which is then held in position by slight 



Fig. 63. 



pressure on four points of C and D. From the construction of the 

 instrument it is evident that it may be laid down without fear of con- 

 taminating the film. 



Practical Filtering Apparatus, f — Prof. H. Preisz has devised an 

 apparatus for filtering diphtheria serum and such like fluids. It consists 

 of two parts, the upper being the filter proper and the lower the re- 

 ceptacle. The filter is a Nordtmeyer-Berkefeld bougie, the lip of 

 which (see fig. 64, one-third natural size) is clamped to that of the re- 

 ceptacle, caoutchouc rings intervening to render the joints air-tight. 



* Journ. Quek. Micr. Club, viii. (1901) pp. 155-6 (2 figs.). 



t Centralbl. Bakt., 1" Abt. Orig., xxxi. (1902) pp. 173-4 (2 figs.). 





