650 NEW JEKSEY AGHU T I/IU' IJAl. COLLIXiE 



the aoiil Avill dissolve the camphor and kwve a olear, soiiuAvhat 

 volatile liquid Avith rather an agreeable odor. In actual practioe 

 I placed the bottle of crystals iu a can of Avarni Avat^i'r and allowed 

 it to liquify gradually, |X)uring the liquid over the camphor from 

 time to time until no more acid remained. The resulting solu- 

 tiini is jH'viuaiuMit and may be kept in tight jars or bottles iiuh^ti- 

 uitoly. 



The directions are to evaporate three ounces of this Culieido for 

 every 1,000 cubic feet of space in the room or building to be treated 

 and to keep such s})ace tightly closed for a period of at least twenty 

 minutes. Xeither metals nor delicate fabrics are affected by the 

 vapor, hut iK^sides mosquitoes it also kills flies and other insects. 

 The liquid is inflammable, but not explosive, and as it requires heat 

 to volatilize it, the apparatus should be placed in a pan or tub of 

 water to avoid danger of fire. 



Surg:eon Berry, of the ^laviiu* Hospital Service, who gives an 

 account of his exjx^riments with the material in the Public Health 

 Report for Febrnary ^d, lOOG, Vol. XXL, Xo. 5, reconmiends as 

 an oiiitit : "(Jalvanized iron stove pipe eight inches in length. 

 Cnt out sections from bottom so as to leave three legs, the cut-out 

 sections giving entrance to air. This pipe is put over an alcohol 

 lamp. In the ui)i»r part of the pijx^ muke half a dozen air holes 

 al>ont one-fourth of an inch in diameter to provide a projier outl(^t 

 for the draft. On top of the pijx? place a pan in which the evapora- 

 tion taket? place. A granite ware wash basin answers every pur- 

 l>ose and is letter than anything else, be^^anse it evajxu-ate^ the 

 liquid com]>letely." 



In accordance with the above suggestion. 1 made ihe apjiaratus 

 shown in Figure 7 out of five-inch stove pi]H\ and in a tin flat-bot- 

 tomed basin that fitted into the top of the pipe evaporated two 

 ounces of ('nlicid(^ in twenty-five minutes, using one-half an ounce 

 of alcohol in an ordinary glass alct^lud \au\]\ A tin basin Avas used 

 Ix'cause it would heat u]> faster, and by measuring out at the rate 

 of one ounce of alcohol for four ounces of Cnlicide com]>lete eva}> 

 oration may be obtained without danger of burning out ilu^ aji- 

 paratns. It is ]M>ssible to remain in the room until fumigation is 

 well nndcM- wav and the va]XM- becomes quite dense, and the room 

 niav \k (Mitcrcil again when the work is completed al'icM- a deor or 

 window has hcen allowed to roniain open a finv niiiniu>s. Although 



