FISH OIL AS ADHESIVE IN ARSENATE-OF-LEAD SPRAYS 
The fish oil, when added to the arsenate-of-lead mixture, mixed 
almost instantly. It was sprayed on a partly cloudy day with light 
to moderate wind, at a temperature of 65° to 70° F. This material 
Fig. 5. — Appearance of foliage in plot at Watchung Ridge, sprayed with mixture containing fish oil 
as adhesive. A, foliage shortly after application of spray, June 5, 1924; B, foliage on September 17, 
1924 
spread over the foliage slightly better than the corn oil, but not so 
well as the soap (fig. 5). 
The linseed oil mixed with the spray mixture as readily as did 
fish oil. The spraying was done on a partly cloudy day at a tempera- 
Fig. 6.— Appearance of foliage in plot at Watchung Ridge, sprayed with mixture containing linseed 
oil as adhesive. A, foliage shortly after application of spray, June 5, 1924; B, foliage on September 
17, 1924 
ture of 65° to 70° F. The spray spread fairly well, but did not cover 
the entire leaf, as did the soap mixture (fig. 6). 
The proprietary casein product, a well-known article on the mar- 
ket, was mixed with a small quantity of water before being added to 
3387°— 26f 2 
