FROST 
On the two mornings following what 
was very nearly a repetition of the phe- 
nomenal temperatures of the 13th was 
experienced. It was undoubtedly a stren- 
uous period for the fruit men and one 
which is not likely to be repeated for 
many years. It showed the necessity of 
using an ample number of smudge pots 
and also the value of orchard firing on 
a large scale, showing the greater ease 
of heating a large district than a small 
one, or one in which heating is practiced 
only in a sporadic way. 
North Yakima men were unsuccessful 
in maintaining safe temperatures, partly 
because they used too few pots—generally 
about 40 to 50 to the acre—and partly 
because each heated orchard was sur- 
rounded by unheated ones, and the wind, 
which was a feature of several frosty 
nights, effected a dispersion of heat and 
smoke. When practically all the orchard- 
ists fire, windy conditions can much bet- 
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1015 
ter be coped with. On the morning of 
the 11th in particular orchardists re- 
ported that whereas under ordinary cir- 
cumstances they could raise the tempera- 
ture six degrees to seven degrees with 55 
pots to the acre, on this morning it could 
only be raised three degrees. On the 
south slope of Nob Hill the smoke blew 
rapidly away, scarcely reaching the lower 
branches of the trees. 
It was on this night (10th-lith) that 
the severest freeze occurred in the Nob 
Hill and Fruitvale districts, which are 
generally least affected by frost, the for- 
mer being considered immune. The ther- 
mometer in the Weather Bureau shelter 
in North Yakima registered 29 degrees, 
and in Moxee 28 degrees; 31 degrees was 
reported from Parker, 28 degrees from 
Zillah, and 33 degrees from Sunnyside. 
That conditions as usually experienced 
suffered a complete reversal will be seen 
when it is stated that the temperature 
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Yakima Valley Fruit District. 
—After Reed. 
