278 Valuable Points in a Homy Extractor. 



Langstroth's, if we may judge from the engraving, was. 

 very much like the ones of to-day. 



DESIRABLE POINTS IN AN EXTRACTOR. 



The machine (Fig. 103) should be as light as is con- 

 sistent with strength. It is desirable that the can be made- 

 of tin, as it will be neater and more easily kept sweet and 

 clean. The can should be stationary, so that only a light 

 frame (Fig. 104) shall revolve with the comb. In some 



Fig. 106. 



Automaiic Extractor. 



of the extractors (Fig. 104) the walls of this frame incline. 

 This keeps the frames from falling in when the machme 

 is at rest, but varies the centrifugal force, at the top and 

 bottom of the comb, which is urged as an objection. Of 

 course this difference in force is very slight. Some of the 

 extractors, like the United States (Fig. 103), are made sO' 

 that the whole center can be removed in a moment, and 



