I'liniitiirc Pests. 123 



if well aireil afkrwanls ; but us it in hi;jlily txplosivc he lulvisc-a the iikc of 

 hjdrocyiiiiic acid giu«5 ivs nst-d for destroying insects under ghuw, etc. 



The cyanide treatment is deadly to all insect life and does not liarni 

 food or anythin>r ; but care has to l>e tJikeii that the poison is not eaten or 

 the fumes inhaled by any jhi-som. 



You could only use the C'hinosol for floors and crevices. 



Directions for nsimj Hijdrocyaiiic Arid Gas Indcnvs. 



The ftdlowing are instructions sent to Mr. White with regard to 

 the gas trcatiiient. 



Tlie proiwrtions fi»r hydrocyanic acid gas ti-ealinent are as follows : 

 2 ozs. of cyanide of potassium. 

 4 ozs. of sulphuric acid. 

 7 ozs. of water, 

 for 1,000 cubic feet of space. 



Proceed as f«dlows : Add the 4 ozs. of acid to the 7 ozs. water in a 

 deep saucer or jam-pot ; then roll up the small lumps of cyanide in 

 blotting-pai>er and drop into the acid and water. Leave for a cou}de 

 of l»oui-s ; then freely ventilate the room ; do not enter it for an h<»ur 

 after ventilation, as, of coui-se, you must not breathe the fumes, as they 

 are deadly, and so is the cyanide. It would Ixj .sjifest to bury the 

 residue, but it is innocuous. You can ejisily manage windows for 

 ventilation, so as not to have to enter the room to dt) so. I should 

 put the saucer just inside the door, so the arm can reach it, and 

 drop the cyani«le in blotting-})aper into the .saucer, shutting the door 

 immediately. Of course, do not let people stand about outside the 

 door, a.s some fumes may come through crevices, etc. Get the room 

 as air-tight as ]X)ssible. 



The propirtions I give have l>een f<»und sufficient in gix^juhouses 

 to kill lied Spider, Woodliee, Slugs, Aphis, and Caterpillars. 



The employment of this gas for Ibid Mite in Currants {Kriophi/cs 

 rihis) has not proved it to be successful. Sulphur in some form alone 

 sn/ns to (ijfcct (leori. It is thus interesting to leani that fumigatiim 

 with hydi-ocyanic acid gas did not alfecl this hou.sehold jK-st, but Mr. 

 White tells me he dwired it out by sulphiu- fumigation. 



Anol/iuintt'ssi'llatuin in St. Alban's Cathedral. 



An insect, .sent by Mr. Nathaniel Hick.s, in oak from the nx)f of 

 St. Alban's Cathedral, proved to l>e one of the comnK>n WcKHl-lxiring 

 Beetles — a serious furniture iK.'st — known lus the " Death Watch " 

 {An obi H wi ttssellat u m ). 



