fierce, wintry blasts sweeping over the plains and filling the air with snow and dust.
A single experiment taught me the inadvisability of leaving the camera exposed for any length of time to these conditions. I had been trying to get a large photograph of Horned Larks. The camera was placed on the ground and a handful of oats scattered before it,
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HORNED LARKS AND SNOWFLAKES
while I waited within the cabin for nearly two hours for an opportunity to pull the thread attached to the camera shutter. But the birds persistently avoided the pebble marking the focal plane, and clouds continually obscured the sun when I wished to make an exposure. At last the right moment came, I pulled the thread, and hurried out to get the result. That plate was never developed. Snow had clogged the shutter, and I found it had remained wide open after being sprung.
By throwing oats on only one spot, and that close to the window, I soon gathered quite a flock of Horned Larks, who came regularly every morning to feed from the constantly replenished supply. Finally, after a week of gloomy, dark weather, a cloudless sky offered especially good chances for a photograph of my feathered friends. This time I placed the camera on the window-sill. Maneuvres attendant upon focusing and inserting a plate-holder, of course,
