LABORATORIES AND THEIR EQUIPMENT 



8 5 



in the cross-section in 

 Fig. 4; on one of the 

 long sides two doors 

 must be left, which 

 can be tightly closed; 

 the top may be hinged 

 to allow opening for 

 ventilation at times ; 

 support the whole on 

 a firm table ; shelves 

 of glass or wire net- 

 ting may be added; 

 use preferably a Koch 

 safety burner (which 

 shuts off the gas if the 

 flame goes out) and 

 a Reichert regula- 

 tor. The entire cost 

 should not exceed $25 

 to $30. It should 

 not be built into 

 the window, at all 

 events not without an 

 extra sash some in- 

 ches from the win- 

 dow sash. 



SCALE IN INCHES 



18 



Other npre^arv nr FlG> 4- Plan for a Wardian case, in cross- 

 sai T section. H, sheet-iron hood; //, hinge of 



desirable furniture is 



top; W.B., water box of galvanized "iron; 

 dotted lines show legs of table. 



