508 SUMMARY OF CURRENT RESEARCHES RELATING TO 



(through the medium) is examined to see that there is no preceptible 

 amount of distortion. It is well to allow the heating to continue for at 

 least a minute or two after any pressing with the forceps, that the glass 

 may resume an unstrained condition. This completes the mounting 

 proper, though I prefer to use so small a quantity of the medium that 

 when flattened out the disk does not quite reach the ridge of the cover 

 glass, and to run in a little melted paraffin wax round the remaining 

 space. The slide can be rung as usual when thoroughly cold." 



(6) Miscellaneous. 



Simple Method of Collecting Centrifugates.* - G. C. Van Waken 

 has devised a simple method of collecting centrifugates for examination, 

 the peculiarity of the method .consisting in the fact that the centrifuge 

 tube and the transport pipette are one and the same insmnnent. The 

 following particulars refer to urine examination, but various modifica- 

 tions may be made to suit other purposes. The " centrifuge pipette " 

 consists of a glass tube some 9 cm. long, which, at its lower end, tapers 

 to a circular opening of 1 mm. diameter. The upper end of the tube 

 is closed with a small cork stopper. The pipette is filled by closing the 

 lower opening with the finger and introducing the fluid through the 

 upper opening with a suitable pipette. The cork is then put back, 

 the tube rotated and the cork gently screwed in until all air bubbles 

 have been driven out. The centrifuge pipette is then placed in the 

 centrifuge cup (11 cm. depth), which is filled with water just to cover 

 the cork stopper. After centrifugalization, the pipette is removed, the 

 outside cleansed as much as necessary, and a drop of the sediment allowed 

 to fall on to a glass slide, for subsequent examination. 



* Zeitschr. wiss. Mikrosk., xxxi. (1914) pp. 40-2 (1 fig.). 



