well as
the directions and the velocity of the wind for periods of seventy
days and more. This instrument was the achievement of Professor S.P.
Fergusson, for many years a pioneer worker in mountain meteorology
at Blue Hill Observatory and an associate of Professor Church at the
Mount Rose Observatory, which has now become a part of the University
of Nevada.

After two winters' work it was discovered, on making comparisons with
the records at the Central Weather Station at Reno, 6268 feet
below, that frost forecast could probably be made on Mt. Rose from
twenty-four to forty-eight hours in advance of the appearance of the
frost in the lower levels, provided the weather current was traveling
in its normal course eastward from the coast.

[Footnote 1: Since this was written Professor McAdie has been
appointed to the chair of Meteorology at Harvard University.]

Second only in importance was the discovery and photographic
recording of evidence of the value of timber high up on mountains, and
especially on the lips of canyons, for holding the snow until late in
the season.

This latter phase of the Observatory's work has developed into a most
novel and valuable contribution to practical forestry and conservation
of water, under Dr. Church's clear and logical direction. At
Contact Pass, 9000 feet elevation, and at the base of the mountain,
supplementary stations have been established, where measurements of
snow depth and density, the evaporation of snow, and temperatures
within the snow have been taken. Lake Tahoe, with its seventy miles of
coast line also affords ready access throughout the winter, by means
of motor boat, snow-shoes and explorer's camp, to forests of various
types and densities where snow measurements of the highest importance
have been made.

Delicate instruments of measurement and weight, etc., have been
invented by Dr. Church and his associates to meet the needs as they
have arisen, and continuous observations for several years seem to
justify the following general conclusions. These are quoted from
a bulletin by Dr. Church, issued by the International Irrigation
Congress.

The conservation of snow is dependent on mountains and forests
and is most complete where these two factors are combined. The
mountain range is not only the recipient of more snow than
the plain or the valley at its base, but in consequence of
the lower temperature prevailing on its slopes the snow there