IN reply to Prof. Tait's criticism (NATURE, December 31, 1891, p. 199) of my paper (December 17, p. 152), I wish to say that I certainly do not consider Van der Waals's b as an absolute constant.

MY DEAR PROF. TAIT,—I gather from your letter of September 28 (NATURE, October 8, p. 546) that you admit the correctness of Van der Waals's deduction from the virial equation (1) when the ...

Van der Waals forces are fundamental for chemistry, biology and physics. However, they are among the weakest known chemical interactions, so they are notoriously hard to study.

By measuring these oscillations, the team worked out the Van der Waals force between the two Rydberg atoms. By adjusting the trapping laser beam, the team can move the Rydberg atoms closer together or ...

Van der Waals forces are around ten times weaker than the force that exists between differently charged ions, for example. Nevertheless, they are interesting not only for theorists like Tkatchenko and ...

WaaFs utilize van der Waals interactions, which were previously considered too weak, to form robust three-dimensional frameworks. These structures maintain their integrity at temperatures up to 593 K ...