I speak of these substances first because they are of all insecticides, the most important. There is 110 insect that can take either of these poisons into its system and live, hence their great value for the destruction of leaf-eating insects where the application does not endanger the lives of other beings. The poisonous principal in both of these substances is arsenic of which Paris green contains about fifty-seven per cent, and London purple about forty-seven per cent. This difference should be taken into account when these two poisons are being prepared. It should also be borne in mind that a given bulk of Paris green is fully double the weight of the same bulk of London purple.

During the winter there were a large number of question sheets sent out to farmers of the state making inquiries concerning injurious insects. These inquiries have been well responded to and have brought in a large amount of valuable information that will be a help in carrying on future entomological work at the Station.

The insects treated of in the present Bulletin are, for the greater part, those concerning which most inquiries have been received and about which the farmers seem to be m most need of information.

It is sincerely hoped that, during the present year, the farmers of the state will observe more carefully and report promptly to the Experiment Station any insect injury that may come under their observation that I may the more intelligently carry on my department of experimental work in the interests of agriculture.

Within the last decade sorghum has taken its place among the important crops of the country.

As a fodder crop peculiarly adapted to the dry climate of parts of the West it has proved its worth ; as a source of molasses and syrup it has become popular with both producer and consumer; but it is chiefly as a prospective source of the great staple which the people of the United States consume at the rate of fifty-six pounds per capita per annum, and of which we import annually one and one-third million tons at a cost of over 120,000,000 dollars, that sorghum now attracts the attention of all enlightened Americans.