60 
FLOUlfc MILLS AND STORES. 
every night when the works stop. If this be persistently followed out 
but little development of new forms will take place. It must be 
remembered that this work must be persistent and thorough ; abun¬ 
dance of sulphur burnt, again and again, being the sufficient condition 
of success. 
“ Where, however, the larvae have, as it were, gained possession of 
bolting-cloths and carriers, treatment with steam under pressure 
driven throughout all parts of the bolting-cloths, carriers, and other 
machinery has been found very useful in lessening the inconvenience 
from the spinning of webs, and thereby the clogging of the machinery. 
The walls, floors, and ceilings may further be treated with advantage 
by first brushing down all dust, and thereafter spraying them with a 
solution consisting of a drachm of corrosive sublimate to each gallon 
of water by means of a gardener’s force-pump. Treatment with fumes 
from burning sulphur while parts are yet moist from this washing 
down will greatly aid in the destruction of any larvaa or cocoon forms 
which may be reached.” 
Instead of corrosive sublimate a wash formed of soft-soap, water, 
and paraffin may be used, and applied by a gardener’s force-pump. 
There is considerable difficulty in making the mineral oil and soap 
wash unite permanently, but if, instead of a force-pump, a large pail 
was used and the mixture distributed by hand with a syringe, this 
difficulty would be got over, for the ingredients in the pail would be, 
or could be, perpetually remixed by repeated action of the syringe. A 
proportion of 2 gallons of kerosine (or paraffin), 1 gallon of water, and 
lb. soap, either common or whale-oil or soft-soap, when properly 
churned by a force-pump and spray-nozzle for five or ten minutes, 
makes a kind of cream. This should be diluted for use at the rate of 
1 gallon of the emulsion to 9 of water. 
In the foregoing paper I have repeated some small proportion of 
information from my previous Reports, and given the most important 
points of the treatment which has proved serviceable at home, and 
was adopted and much amplified in detail and improved in application 
in Canada. At present the very seriousness of the infestation is, I 
know, causing its increase, for no firm suffering under the trouble is 
willing to let the trouble be made public. But this at least I may say : 
I have carefully preserved the confidence reposed in me hitherto, and 
if in the future any firm will be so very kind as to place in my hands 
any information of measures which are more effective than the 
partially successful and costly arrangements which, so far as I know, 
are all that have been tried at present, I would very thankfully make 
this information public, with the utmost care (unless permitted other¬ 
wise) to give no clue to the name or locality of the contributors. 
