10 



patented articles are exhibited without comment, for the reason that all 

 practical requirements in the way of remedies are met by the use of 

 unpatented substances shown in the first portion of the exhibit. 



Section 6. — Machinery. 



In this section are included the more important nozzles for the appli- 

 cation of liquid insecticides and a few of the leading insecticide ma- 

 chines, the latter collection representing some typical forms, special 

 prominence being given to the knapsack sprayers, and no attempt be- 

 ing made to show make a complete exhibit of all insecticide machinery. 

 A feature of the nozzle exhibit is a series of trial nozzles which were 

 made in the elaboration of the principle of the cyclone or eddy-chamber 

 spray nozzle, which, with its modifications, is now in such general use 

 in all parts of the world, and the original type of which has come to be 

 known (against my own inclination) as the Eiley nozzle. 



Section 7. — Official Publications of the U. S. Entomologist. 



This section includes as complete a file as could be secured of the 

 official entomological publications issued by the national government, 

 and comprises both the work of the Division of Entomology of the 

 United States Department of Agriculture and of the United States 

 Entomological Commission. 



Section 8. — Illustrations, Maps, and Charts. 



An exhibit has been prepared of all the entomological illustrations 

 which have been published by me in an official capacity, either as 

 State Entomologist of Missouri or as United States Entomologist, aud 

 also as chief of the United States Entomological Commission. These 

 are grouped in two series; one, illustrations of North American insects, 

 mostly from my reports on the insects of Missouri, and from my own 

 drawings; the other, illustrations of North American insects, mostly 

 from drawings made under my supervision by Miss Sullivan, in the 

 Division of Entomology, U. S. Department of Agriculture. The illus- 

 trations of machinery which have been published by the Division and 

 by the Entomological Commission, are also included in this section, 

 but are exhibited separately with the exhibition of insecticide machin- 

 ery. All these illustrations are mounted on large sheets, and have 

 references to the publications in which they are fully described. With 

 this part of the exhibit is also shown a series of maps and charts illus- 

 trating the range of important injurious insects on this continent, and 

 a number of large solar prints illustrating the classification of insects, 

 by means of charts representing the different orders and suborders by 

 typical insects in their different stages of development. There are 

 also charts of special injurious species, together with views represent- 

 ing the x^ractical application of insecticides, and interesting views of 



