WAX EXTRACTORS. 



137 



screw (Fig. 129) will be flush, or, if anything, 

 somewhat lower than the surface of the wood. 

 When the entire stand is put together, the ex- 

 tractor can be attached to it by means of four 



---2 --> 



-10" -> 



Fig. 130. Section of Gerster Wax Extractor. 



screws passing upwards into the bottom. The 

 object of the revolving part is, of course, to enable 

 the glass top to be turned, so as to catch the 

 direct rays of the sun. 



The Gerster wax extractor, of which a section 



