This paper presents a brief overview of the tests available to evaluate the toxicity of whole
soils and groundwater. The soil toxicity tests include: earthworm survival toxicity tests (acute); …

The daily maximum temperature observations in the United States during two series of regular
27‐day periods in the years 1947 and 1953 are harmonically analysed. The amplitude …

This publieation was proeeeded, already in 1917, by eonsiderations concerning a period of
89 years, dedueed from 13 temperature waves of this duration between AD 760 and 1916, …

Deep‐focus earthquakes—Earthquakes with extremely deep loci occur in well‐defined
areas. The deepest foci, 600 km and more, are to be found in Japan, the Philippines, the …

Five ofBerlage's eight empirical rules concerning the Southern Oscillation (1957) may be
united in one general rule with regard to the different influence of solar activity during 11-year …

Deterroinations of the vapour density of normal butane have enabled us 10 calculate the
virial-coefficient B in the empirical equatlOn of state as established by KAl\iERUNGH ONNES 1)…

July 26, 1958 NATURE Page 1 © 1958 Nature Publishing Group No. 4630 July 26, 1958
NATURE 253 of shorter life-time (such as curium-247, plutonium244, uranium-236, lead-205 …

A furtheL'confirmation of the presence of an admixture like ethane is afforded by the mlue of
the critical temperature (l50. 8). When for the varions saturated hydrocarbons a gl'aphieal …

Nederland kent zes Greenports; grote tuinbouwclusters waarin planten, bomen, bollen,
bloemen en groenten worden geproduceerd en verhandeld. Het Rijk erkent deze gebieden als …

In 1904 werd op het nieuw in gebruik genomen terrein van het Rijkslandbouwproefstation in
Groningen, op initiatief van de toenmalige directeur Sjollema een proefvak aangelegd, met …