tSSECTICJDES AXD FVSGICIDES: FTMKATJOX 57 



denstored afeofaol to ineore barning: tiieii figitt the mM-^r ^aad loeep tfe 

 place t%iith- dosed for 24 to -IS lir.; tfaea air thorougilj. 



HydiucjaM c urid Gas i^CX . — ^Thk k one of tke moei pomahA aad 

 dai^aoiB gases known, and p&gso^g having had no tiaiMa g in its ice arc 

 advised not to trv it. It k prodastd hy the adifitioB <tf «MBm or pot^ 

 aann cvanid to solfmicaad vlndb has been dhitedvitiftvaier. Fo uitali -, 

 pofaagonicyamd was isedahnost entirely biitnoir the soi&mieyaBid hag 

 taken ifs i^aee. Care dioiild be taken tikat llie craaid is id good quEty 

 and (at leas for use with plants) eontaiiis no «*lMii*«» IS pocaaai^ 

 cranid k used it dioiild contain 38 per eent of cjanogeB: tf soAnra craaid, 

 51 to 52 per eent. Thesmfaric acid Aoold hai^ a ^pedfie ggaiiAi rf LSI 

 and be free of any nitnc acid. 



Hjdrocjanie-acid gas can be used to adrant^e in tJbe SoKttamms wsysz 



(a) For hoosehold and stosefaoase pes& and for f^a^ting fa^es of 

 nnpcrted cotton. 



Ck) Fo? sreaihaiBe inaects. 



if") ± -T -^~^ns on dnrntar- -^z'sery r: :•:♦:. 

 :1s en otzi^ " 



7 ;!ias,anoc^ :. — - r^^i --=^ ^"^y lOOen. ft. of 



: leai&s 2 hr. of lianigatian i= u^^ffEs^ijnr. 



?T5 the dose fe fa to ' ^ 'iir 



^~T ; - i ftimigation period c: ^ 



s,T a temperature of about 6-5TF. sjad a km- per i . 

 m jtstme. dioald be given onbr after dark. So^ :e 



varieties of pbnlsni^ be somewbat injured by tLi^ _rr 



modi less than by the continiKd attacks of ijbe iEserif. T_ .z.is 

 dftonld be dry (not watered reeesthr) at the time of - 



Dormant nmsory stock ^loald be trB&tef -srrt '^ ^3^nn 



cyanid fw every 100 cu. ft-, fA 1 hr. Ti - _ _ ^ ^ — ^ aor 



voy dos^ packed. 



For the imn^aiioo of cntroE Tr?55 rirziz i___ - r asoes 



neaih- dormant deason (October to January ^^ to 1^^ j- cj»- 



nid ^ftoold be iBed for evoy 100 CO. :' olhr. 



The vafaie of good extras trees 5? =o; i , - _ _ _ _ __ S? s2L«d 



used for fmni^tii^ them. 



In uang potas^Don cyanic C!Zic--iiJwn:i nifuc^ s^jOwj^ ce i^^kcSk :&5 ~i^ 

 dose than indicated above. 



Befwe treatii]^ any pl»ee to be fmnig^ied. desemnBe il-e - — 

 cubic feet in the place and ve^^ oat the props- amoont C£ 

 ing thb quantity as the tmit &on& wbidi to detemmae ~ _:; 



sotfaiic acid and wmter for this dcee. measaore oat 1^ i±: zmA. of 



the acid in fioid ounces and twice as mtieli ~ ^s. 



Thus if the space to be fknnigated cs^ ftsr - - je 



ryanid- 6*^; fl. oe. of tibe acid, azi r z :i :: ^ ^irnsie the 



