84 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 16 
Our experience indicates that to obtain the best results for the money 
expended in dusting, there should be at least 50% of the vines infested 
when dusting is begun. 
President J. G. Sanders : The next paper is entitled “The Possibility 
of Transmitting a Weevil infestation from wheat to macaroni through 
the process of milling and manufacturing,” by Royal N. Chapman. 
THE POSSIBILITY OF TRANSMITTING A WEEVIL ( SITOPH - 
ILUS) INFESTATION FROM WHEAT TO MACARONI 
THROUGH THE PROCESS OF MILLING AND 
MANUFACTURING 
By Royal N. Chapman, St. Paul, Minn. 
(Withdrawn for publication elsewhere) 
President J. G. Sanders: We will now hear a paper entitled “Vacu¬ 
um Fumigation Experiments Using European Com Borer and Brown- 
tail Moth Larvae Under Winter Conditions,” by R. I. Smith. 
VACUUM FUMIGATION EXPERIMENTS WITH BROWN TAIL 
MOTH AND EUROPEAN CORN BORER LARVAE 
UNDER WINTER CONDITIONS 
By R. I. Smith, Boston, Mass. 
(Withdrawn for publication elsewhere) 
President J. G. Sanders: The next paper is “Further Data on 
Fumigation with Hydrocyanic-acid Gas in Greenhouses on a Com¬ 
mercial Basis,” by E. R. Sasscer and C. A. Weigel. 
FURTHER DATA ON FUMIGATION WITH HYDROCYANIC 
ACID GAS IN GREENHOUSES ON A COMMERCIAL BASIS 
By E. R. Sasscer and C. A. Weigel 
Abstract 
The formula used was 1 ounce avd. sodium cyanide, liquid ounces sulphuric 
acid (1.83 specific gravity) and 3 fluid ounces of water. Frequent one hour exposures 
in a greenhouse containing a large number of different plants, were followed by no 
permanent injury, though temporary burning occurred on such plants as jasminum, 
