SEVERAL circulars recently received from the Bureau of Standards of the Department of Corn- merce, Washington, well illustrate the untiring in- dustry to be found in the American public offices.

OSMIUM tetroxide at 18s. a gram is the most expensive substance used in biological research. It is principally used in the Kolatchew and Weigl methods for the Golgi apparatus, and in the F. W. A. and ...

Apparatus positioning, like nearly all facets of the fire service, does not have a “one-size-fits-all” answer or method. Positioning apparatus in relation to other apparatus already on the scene of an ...

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