54 INSECTICIDE STUDIES. 



It is evident from the analyses of the two samples of boilene insecti- 

 eide made in the laboratory that the first one (04-4- I iSc W) consists of 

 about 50 per cent carbon bisulphid and 50 per cent crude petroleum 

 with a very small (jiiantity of some essential oil having a strong 

 odor, while the second (04-5 1 & W) consists of about (r2 per cent 

 water. 14- per cent carbon bisulphid, and *1'.\ per cent petroleum, with 

 a little essential oil and a small quantity of soap. Whether or not 

 a compound of this composition, which is evidently very variable, 

 would kill the bollworm is a matter for experimentation. 



The results of the analy>e> of these two samples were forwarded 

 to the manufacturer, who in reply said: "This analysis is not at all 

 correct, and since the analysis was made I have perfected my prepara- 

 tion/' Another letter was then sent, asking in what particular the 

 analysis was unsatisfactory, but to this no reply was received. The 

 analyses of these samples was repeated, but the same results were 

 obtained. Besides this it is found that the analyses made in this 

 laboratory gave very much the same results as those made by the 

 Texas authorities from a qualitative standpoint. Unless the results 

 obtained by the Texas authorities and by this laboratory are approx- 

 imately correct the manufacturer is selling all of his goods under a 

 false label, since the Texas law requires that all insecticides sold in 

 the State shall comply with the official analysis on every package. 



KXCKI.Sloi; IVSKCTICIDK AND WOOD PRESERVER, RED CEDAR BRAND. 



[No. <-:;, I A:\V.] 

 AY.SV//V.S- <>f distillation test. 



iVr cent. 



(1) 80-110 C .............................................. 1. 01 



(2) 110-180 C ............................................. ".31 



(3) 180-230 C ............................................. '' 7. 42 



(4) 230-270 C ............................................. '' 21 . W 



(5) 270-300 C ............................................ 16. 50 



(6) 300-330 C ............................................. 15). 1 1 



( 7 ) :v.\o-:ttC ............................................. 1 5. 84 



(8) R<->ilii<- ami IOSH ........................................ 17. W 



" Li.irlit nils with odor of IHMI/CIH-, tolia-iu-, etc. 

 /M.ivc u--t< for phenol 



Fractions 4. 5. J. and Tare heavier than water. At about :)4" C 1 . 

 the distillate hco-in- to -olidify in the condenser, and at 355 C. the 

 condenser i> >o >topped up with naphthalene that it is necessary to 

 rea>e di>t illin^ 1 . Thi^ ap]>ear< to be a simple of coal-tar creo>ote. 

 and when properly n-ed i^ of value both a- an in>ecticide and a wood 

 preserver. 



