67 
evaporated. During the colder part of these days the spray froze 
as soon as it touched the bark. 
May 26, 964 scales were examined, of which 773 were dead, and 
191, or 20 per cent., alive. May 29 a general inspection of this plot 
showed many living scales, young and old, both decidedly more abun- 
dant on the apple than on the peaich. Fifty young, for example, 
were found in one square inch of the under surface of a twig two 
inches in diameter, and on another eoual area no were counted. 
Traces of the winter spray were still visible on the trees. Septem- 
ber 5 the average infestation was estimated at 2.4 degrees, which, 
compared with the 4.94 of the check plot for this orchard, gave a 
benefit ratio of 51 per cent. If the September condition of these 
trees is compared with that of January, a gain of 23 per cent, is 
found. 
8. This is a companion experiment to No. 6, the same prepara- 
tion being used, in the previous case in March and in this case in 
January. It was the usual "California wash" of 15 pounds each of 
lime, sulphur, and salt, to 50 gallons of water. It was sprayed Jan- 
uary 10 upon three rows of peaches, 47 trees in all, in Orchard II. — 
a plot immediately beside No. 6. The temperature ranged from 
10° to 12° above zero, and snow was falling, with a northeast wind. 
The spray froze as it struck the trees. 
At the inspection of the 29th of May this plot was reported as in 
very unfavorable condition, many young scales being found on 4 
trees examined. September 10 the infestation of this plot averaged 
3.1 degrees — to be compared with 5.6 of the check plot of its or- 
chard. This gives a benefit of 45 per cent, as compared with the 
September check, or of 12.5 per cent, if compared with its own 
January condition. 
9. This is an experiment with the "Oregon wash," 20 pounds 
of lime, 15 pounds of sulphur, and i^^ pounds of blue vitriol, to 
50 gallons of water. It was applied to a plot of eight rows in Or- 
chard I. containing 126 trees, only five rows of which, containing 
78 trees, were used for comparison, owing to an apparent contami- 
nation of three rows from the check plot adjoining. These trees 
were sprayed January 3 to 5, the temperature ranging from 28° to 
36°. Two hundred and sixty-two gallons were used, the most of it, 
January 4. 
One thousand and ten scales taken at random from 12 trees were 
examined in this orchard May 27, and 26 per cent, were found alive. 
Generally speaking, however, the condition of the orchard was re- 
ported as extremely favorable. Most of the insects found were on 
the higher twigs, which were less heavily coated^ with the residue 
