(1) THE perusal of a treatise on valency leaves an impression of incompleteness and uncertainty, of a mass of theories no single one of which can claim to correlate and interpret more than a portion ...

THERE is no branch of chemistry in which greater progress has been made in the last twenty years than the study of valency. A full understanding of the principles of chemical combination demands a ...

The properties of equivalent orbitals, as defined in previous parts, are examined in more detail. It is shown that the character of an equivalent set can be deduced knowing the symmetry group of a ...

A team of researchers at the Max Born Institute have managed to fully characterize few-femtosecond-long light pulses tunable ...