WCP3484

[1]

Experimenteel Physisch-Psychologisch Laboratorium

Den Haag

J. L. W. P. Matla¹

G. J. Zaalberg Van Zelst²

Daguerrestr: 80.

May 6, 1911.

To Mr Alfred R Wallace

Professor.

London.

Dear Sir.

We herewith beg to send you our work "The Mystery of Death 2^nd volume (Dynamistography) for which, as a sequel to Hächel's³ monism, psychology has been treated from a physical point of view.

By defining the volume of the body experimentally, it has been proved that the molecular attraction of the body is so great that it is possible for a gaseous being to exist in a heavier medium

The volume of the matter of the being has been measured and it has also been proved that it consists of ponderable matter

Finally by means of an apparatus (the dynamistograph) the identity of this being may be uncontestably proved. [2] In this way our physical psychology like all other physical sciences, has become purely mechanical, so that our physics-philosophical system fits in with the theory of evolution and modern physical science. May we take the liberty to submit our study to your much esteemed judgment and beg you respectfully to be so kind as to inform us whether you think the contents suitable for translation into your language?

As the right of translation into French, German a[n]d English has been strictly reserved, we are willing to furnish the translated manuscript on terms to be agreed upon afterwards.

Thanking you in anticipation | we remain | respectfully yours | J L Matla | G J Zaalberg Van Zelst [signature]