The first * to draw especial attention to branching and budding forms of the tubercle bacillus were Nocard and Roux (1) in 1887. In the following year Metchnikoff (2) described and figured long, threadlike, branching forms with bulbous ends, observed in old glycerineagar cultfires cultivated at 43.6o-44 ° C. It is probable that these were cultures from avian tuberculosis. )/[etchnikoff suggeste...

When Einstein was thinking about the theory of general relativity based on the elimination of especial relativity constraints (especially the geometric relationship of space and time), he understood the first limitation of especial relativity is ignoring changes over time. Because in especial relativity, only the curvature of the space was considered. Therefore, tensor calculations should be to...

THOUGH budding and grafting have been long used by horticulturists a a means of reproducing genetically complex or sterile clones superior for their fruit or ornamental value, little consideration has been given to these techniques by foresters as a means of improving the unit value of forest stands. Forest geneticists in Denmark and Sweden have, however, sensed the practical value of these tec...

After introducing some cohomology classes as obstructions to orientation and spin structures etc., we explain some applications of cohomology to physical problems, in especial to reduced holonomy in M and F -theories.