Alexander G. McAdie
4larger individual drops are formed and these spread out in space, forming the cloud mass. If the necessary fall in temperature occurs, the cloud drop becomes a drop of water, bound for earth.I have tried to put the process of cloud building before you in simple language. We know very little about it. Some day men will know a great deal about it; but always there will be more yet. It has always been a wonder to me that men were content to know so little about clouds.I remember spending one night with Campbell in the some of the Lick Observatory. He plugged along until early morning getting stellar spectrograms, on a problem that he has been at work on for years. It is all to try to find out how the solar system is moving in space. And I remember thinking that if as much effort could be put into the study of a drop of rain or a drop of dew, the results would be just as marvelous and of as great value to mankind. Some day I hope there will be a big observatory for the study of a dew drop.I don't know if I have met your wishes. I have a great manyphotographs of clouds and want you to see them whenever you can find time.With warmest regards,Sincerely,Alexander G. McAdieProfessor04734
1910 Mar 19
Original letter dimensions: 25 x 20 cm.
Reel 19, Image 0261
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