12 LOEB— TUMOR GROWTH AND TISSUE GROWTH, [January 17, 



Lastly, the first steps have already been taken to find a rational 

 way of curing cancer by procuring immunity in a similar way to 

 that by which we are able to cure a certain number of infectious 

 diseases. Protective sera can not only be prepared against bacteria, 

 against toxins, but also against cells ; and probably also against 

 tumor cells. The beginning has been made. Certain tumors in 

 animals have been made to disappear in such a way. Let us hope 

 that the future holds still better results, and that we shall be able to 

 alleviate sufifering and to gain a deeper insight into conditions that 

 determine the fate of living matter. 



Stated Meeting February y, ipo8. 

 Councillor Rosengarten in the Chair. 



A letter was read from the Fourth International Congress of 

 Mathematics, announcing that the Congress will be held at Rome, 

 April 6-1 1, 1908. 



Professor Edgar Odell Lovett presented a report on the 

 " LcQon sur Tintegration des Equations differentielles aux derivees 

 partielles professees, a Stockholm (Fevrier-Mars 1906) Sur I'invita- 

 tion de S. M. le Roi de Suede par M. V. Volterra, Senateur du 

 Royaume d'ltalie, Professeur de Physique Mathematique a I'Uni- 

 versite de Rome." He also presented a paper on " Integrable 

 Oases of the Problem of those Bodies in which the Force Function 

 is a Function only of the Mutual Distances." 



Professor Horace C. Richards and Professor Arthur W. 

 GooDSPEED read a paper on " Recent Advances in Color Photog- 

 raphy." 



Photographs by the Lumiere process were exhibited by Dr. 

 Hartzell and Dr. W. P. Wilson. 



Stated Meeting February 21, ipo8. 

 Treasurer Jayne in the Chair. 

 Dr. J. H. Hart read a paper on " Artificial Refrigeration." 



