Much that is written in this paper is fragmentary and incomplete, but as the writer is about leaving for a new field of labor, it is thought best to record here such observations and experiments as have been carried far enough so that a knowledge of them will be of economic importance.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.