Performance of two-clone crosses in alfalfa and an unanticipated self-pollination problem /

Caption title.

Perpetual motion; comprising a history of the efforts to attain self-motive mechanism, with a classified, illustrated, collection and explanation of the devices whereby it has been sought and why they failed, and comprising also a revision and re-arrangement of the information afforded by "Search for self-motive power during the 17th, 18th and 19th centuries," London, 1861, and "A history of the search for self-motive power from the 13th to the 19th century," London, 1870, by Henry Dircks ...

Mode of access: Internet.

Frog : design and simulation study of a mechanism which learns self preservative reactions to its environment.

"Contract no. US AEC AT (11-1)1469."