842 



SUMMARY OF CURBENT EESEAECHES RELATING TO 



The disadvantage inlierent to carbolic acid of becoming embrowned 

 by time and exposure to light is retarded by using 95 per cent, alcohol 

 as the liquefying agent instead of water. 



Shebmax, W. W. — Notes on Balsam Bottles. 



[Simple and effectual device for preventing the smearing of balsam and other 

 resinous and sticky substances, with the consequent adhesion of the cork to 

 the neck cf the bottle. A piece of soft whalebone is bent and placed in the 

 bottle, so that supeilluous fluid may be removed on its arch. Also suggests 

 the use of a glass-capped bottle.] 



The Microscope, IX. (1889) p. 277. 



(6) MiscellaiieoTis. 



Apparatus for Isolating Objects.* — Dr. W. Behrens gives an account 

 of an ingenious apparatus intended to save the labour of shaking out or 

 removing certain parts from a specimen. It consists of a circular tin 

 box, fig. 115 6, containing a water-wheel to which water is carried 



Fig. 115. 



through the tube a, and removed by a similar tube not shown in the 

 illustration. The water-wheel drives a circular metal disc c, in which, 

 in one radius, is a series of holes. Into any of these holes is fi:xed a 

 screw which connects the forked end of a long lever d to the apparatus. 

 At the other end of the long piece c? is a clamp for holding the test- 

 tube, which is plugged when the apparatus is in motion. 



The amplitude of the movement imparted to the test-tube depends of 

 coiu'se on the distance of the screw from the end of the lever. 



* Behrens, Kossel, and Schiefferdecker, ' Das Mikroskop,' i. (1889) pp. 161-2 

 (1 fig-)- 



