SOME OBSERVATIONS CONCERNING COLOUR VISION IN DOGS1

Some Observations concerning Metakinesis in Sea Urchin Eggs

One of the more perplexing aspects of mitosis has been the na ture of the mechan ism whereby the chromosomes are moved into their metaphase configuration. Early theories of chromosome movemen t which involved the spindle or chromosomal fibers later gave way to theories proposing alternate mechanisms, as spindle fibers came to be regarded as artifacts of fixation. In recent years, however, evide...

Some Observations Concerning the Recent Typhoid Epidemic in Calcutta

Colour-Vision and Colour-Blindness

Some Observations Concerning Electronic Densities, Electrostatic Potentials and Chemical Potentials

The hypothesis that the electronic density distribution in a molecule is qualitatively similar to the nuclear potential is shown . to be in error in at least two cases-oxirane and cubane-although it does hold true in a' number of other systems. Its emphasis upon the dominant role played by electrostatic internctions with the nuclei is consistent with some approximate molecular energy formulas. ...

Colour vision

The immense range of colours that we see belies the relative simplicity of the system underlying colour vision. We see colours because each of the three distinct types of cone photoreceptor in our retinae is sensitive to a different range of wavelengths of light. The L, M and S cones, colloquially called red (R), green (G), and blue (B), are selective for long, middle and short wavelengths, res...