FISH OIL AS ADHESIVE IN ARSEN4TE-0F-LEAD SPRAYS 
17 
The lead-oleate plot located on Watchung Ridge, at Somerville, 
N. J., was sprayed on June 7, 1924. On June 14, when this plot was 
examined, no burning was noted, but this may be accounted for by 
the fact that on June 12 rain fell steadily for about four hours, and 
on June 13 a heavy rain lasted for about seven hours, and in these 
two days about 70 per cent of the lead oleate was washed off. Later 
in the season slight burning was observed in this plot, but in no case 
was it as bad as that in the plot at Saugus. 
This lead oleate was furnished by the State of New Jersey. Later 
in the season it was found that the formula used at the factory where 
it was made was not satisfactory, and a change was introduced. The 
results here given cover 
the material used, and 
simply indicate that 
with this lot there was 
appreciable injury to 
the foliage. 
MISCIBLE OIL 
For testing its pos- 
sible injuriousness to 
foliage, the proprietary 
miscible oil was used 
in two dilutions; one 
the stronger, in the 
proportion of 1 gallon 
of the oil to 100 gal- 
lons of water, and the 
other in the proportion 
of 1 to 150. Two plots 
of foliage in the Watch- 
ung Ridge area were 
sprayed on June 9, 
1924, each with one of 
these dilutions. 
On July 9 the 
sprayed foliage on 
both plots was care- 
fully examined, and on 
both some of it had suffered injury, the more extensive damage 
being found on the plot sprayed with the weaker mixture. Here 
the foliage on the maple, oak, ash, elm, and dogwood trees showed 
burning, some of it severe. In the other plot slight burning was 
noticed on some of the maple, oak, and dogwood foliage. The 
adhering spray seemed to have been washed away from the leaves 
here much more than from the foliage on the plot sprayed with the 
weaker mixture, which may account for the more severe injury to 
the latter. Slightly more burning in both of these plots was observed 
later in the season. 
The proprietary miscible oil, diluted in the same two proportions 
as for the plots at Watchung Ridge, was similarly tested on two 
plots at Melrose Highlands, both of which were sprayed on June 24. 
Fig. 13. 
■Foliage in plot at Saugus, Mass., burned by spray mixture 
of lead oleate 
