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extensive to include all the infested stock or that it was not thorough 

 enough to destroy all the beetles in what was treated. This partial 

 treatment was, however, sufficiently successful to satisfy the propri- 

 etors that if used in a sufficiently large quantity and so as to include 

 the entire stock, carbon bisulphide would eradicate the pest. They 

 had, therefore, made preparations to thoroughly fumigate the whole 

 establishment, applying more than double the quantity of the insecti- 

 cide that is usually recommended in such work. They desired to clean 

 out the beetles at any cost and preferred to use an excessive amount 

 of bisulphide rather than be obliged to repeat the treatment. Accord- 

 ingly, the}^ had provided 200 pounds of CS 2 and about 35 shallow tin 

 pans about 3 feet long by 1 foot wide and 1 inch deep. At the writer's 

 suggestion, an additional supply of evaporating pans was obtained. 

 Over fifty of these large pans were distributed around the room in as 

 high positions as possible, and a number were placed on top of the 

 stock stored around the gallery. The stairway and elevator shaft lead- 

 ing to the basement were tightly closed and the worst infested stock 

 was opened and the boxes spread around upon the lower floor. The 

 cans of bisulphide were distributed and everything done to facilitate 

 rapid work in the application of the liquid. Owing to the slight danger 

 of generating a spark in turning off the incandescent lights which it 

 would be necessary to have if the application were made at night, it 

 was thought best to defer the exposure of the liquid till early on Sun- 

 day morning, July 14. (The dangers connected with the use of carbon 

 bisulphide will be spoken of more fully at another place in this report.) 

 Soon after 6 o'clock on Sunday morning the work of pouring the 

 bisulphide into the pans was begun simultaneously by the six persons 

 (including the writer) present. Each pan received from 2 to 3 pounds 

 of the liquid. The pans in a vault and the show window and in the 

 wall show cases were filled first and the doors to those compartments 

 were then closed to retard the fumes. Otherwise the doors to show 

 cases and closets and the drawers were all left slightly ajar to allow 

 the unhindered entrance of the fumes. The pans around the sides of 

 the rooms under the gallery were placed so high that a 5 or 6 foot 

 stepladder had to be used to reach most of them. As only one such 

 ladder was at hand, the work was somewhat delayed at this point, and 

 all lower pans on goods along the middle of the floor and on show cases 

 were filled before the work on the higher pans could be completed. In 

 the meantime the pans in the gallery were being filled and the fumes 

 on the lower floor were becoming very dense. The air supply had 

 become insufficient for the workers, and instructions were given to 

 each man to go outdoors as soon as he began to feel dizzy. This 

 most of them did, and after a few refreshing breaths they were able 

 to return to the work; but one or two did not leave the room until the 

 work was finished. (The effects of the gas upon the operator will be 



