The mean values of the relative **coagulative** powers of sulphates of mono-, di-, and tri-valent metals have been shown experimentally to be approximately in the ratios 1 :35:1023.

The ratios of the **coagulative** powers can thus be calculated to be i: x: x 2, and putting x =32 we get I: 32: 1024, a satisfactory agreement with the numbers observed.4 The question of the application of the dissociation theory to the case of fused salts remains.

The average of the **coagulative** powers of salts of univalent, divalent and trivalent metals have been found by experiment to be proportional to the numbers 1: 35: 1023.

We can calculate, by the help of the kinetic theory and the theory of chances, the frequency with which the necessary conjunctions of ions will occur, and show that the general law will be that the **coagulative** powers should be in the ratios of 1: x: x 2.

It was found that the resistance of albinoes towards the **coagulative** effects of injected nucleo-proteids was to that of pigmented individuals as.

Duclaux, for this reason, considers that agglutinins are **coagulative** ferments.