PLATE II. 



Fir,. ^.Strieker's warm sia.se. In the vessel A B C the water is maintained at a constant level (indicated by the 

 dnttod line), and at boiling temperature. A, supply tulir ; I;, waste tube; C.tul>e leading to the stage; D, tube by 

 which the hot water leaves the stage, terminating in a conical dropper, F. ; F, funnel for collecting the drops which 

 fall from F.; <;, waste. The rate of flow is determined by \ arying the height of E, by means of the sliding screw on 

 which it is supported. It .admits of more exact adjustment by means of a fine screw which works in the axis of the 

 vertical column, on which the escape tube is supported. This column is firmly fixed in the stage of the micro8co;5e ; 

 its axial screw terminates above in a milled head, K. 



FIG. 4. Capillary pipette, p. 11. 



Fit;. 14. A similar stage by Strieker, in which the chamber b is wanned by a voltaic current, //are two 

 copper plates to which Strieker's electrodes, represented in tig. i,, arc applied. c. A platinum wire by which these 

 two plates are in communication. It mils round the cistern of the thermometer <1. The electrodes are in connec- 

 tion with the opposite poles of a suitable battery, the elements of which must present a huge surface. 



