48 



THE GUIDE TO NATURE. 



AN ELM BEFORE THE WHITE FOLIAGE 



HAD ATTAINED ITS GREATEST 



DENSITY 



ter miles on a cloudy February day, 

 he would pass through the clouds 

 much as we move about through the 

 fog of a very foggy day and would ex- 



perience much of the same atmos- 

 pheric conditions as are in the pictures 

 herewith shown. 



While from the lower earth regions 

 clouds have the appearances of dense 

 masses, when one is moving through 

 them they are but a dismal smoky 

 mist. It is not an uncommon sight in 

 the high mountain valleys to look off 

 on the distant foot hills and see the 

 fleecy clouds above dragging their 

 feathery tails over the hillsides and 

 tree tops, much as we see the shadows 

 of clouds noiselessly sweeping along 

 over the meadows and grainfields of 

 the lowlands. This is when the evi- 

 dence becomes conclusive — when the 

 dragging tail of fog is identical with 

 the cloud. 



It is the sight of this mist on the 

 mountain side becoming the ordinary 

 white cloud as we observe it continu- 

 ing" higher up until the blue sky above 

 instead of the green mountain slope 

 beyond becomes its background, that 

 convinces us that clouds and fogs are 

 like conditions of the atmosphere, only 

 viewed with different settings. 



As it is not often that atmospheric 

 conditions remain constant for several 

 days, so it is unusual for clouds to con- 

 tinue at the same height for any con- 



OX THE PLAYGROUND UNDER THE FROST BURDENED TREES 



