UNIVERSITY OF FLORIDA 
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Literature Cited 
(1) Fulton. Robert A. 
1942. A leaf punch for use in insecticidal residue studies. Bur. 
Ent. and Plant Quar. ET-189, 2 pp., illus. 
(2) Lathrop, F. H., Plummer, Bernie E., and Dirks, C. O. 
1944. A simplified method of sampling known areas of apple leaves 
for chemical analysis. Jour. F^->^,. f^"+ "^7- ?Q4-295, illus. 
Figure 1.- -Foliage-sampling machine: A, Assembled; B, dismantled to 
show structural parts. 
