DISINFECTANTS AND DISINFECTION. 189 



hiding places, or a mixture of borax 20 parts and precipitated carbonate 

 of baryta (native witherite will not answer the purpose). A great variety 

 of substances are recommended for the extermination of ants, as borax, 

 camphor, balsam of Peru, spraying with benzine, etc. In lawns and in the 

 open generally (in ant hills) they are most quickly destroyed by means of 

 carbon bisulphide. This kills the ants as well as the larvae. 



The exterminators for pests of all sorts is legion and those especially 

 interested must consult some standard work on formulas such, as the Scien- 

 tific American Cylcopedia of Formulas (Hopkins) . 



