A procedural manual for sampling and analyzing sanitary landfill
leachate was designed to guide sanitarians and other public health
officials in monitoring mineral and organic material drainage from
landfill sources. The manual was constructed to allow flexibility of
conducting analytical tests in a field or laboratory environment.
Step-by-step procedures for...
The issue of merging the social sciences might be
thought of as an issue of categorization. It may be that
that things psychologists have learned about
categorization and categories will illuminate this issue.
This analysis concerns the life and scientific work of Henry
Augustus Rowland (1848-1901), organizer and the first chairman of
the physics department at The Johns Hopkins University in 1876.
Special materials used in this research included three pieces of
Rowland's experimental apparatus which are extant in the Smithsonian
Institution Division...
Claytonia perfoliata is a west-American polyploid complex of
common annuals (x=6). The species is polymorphic; exomorphic
characters are often variable within local populations. In a transect
of the Columbia River Gorge diploids, tetraploids, hexaploids, octoploids,
and decaploids were collected, which varied in shape of basal
and cauline leaves, degree of...
Meiotic chromosome counts from 200 populations of Claytonia
(Montia) perfoliata (sensu lato) reveal a polyploid pillar complex based
on three morphologically different, chemically distinct, and geographically
defined diploids. The basic chromosome number is x=6.
Diploid C. perfoliata Willdenow with linear juvenile leaves and deltoid
mature basal leaves ranges southeastward from...