Semi-Centennial Volume. 21 



knowledge, with particular refei'ence, perhaps, to that phase which at 

 the time may be ei^pecially useful to the people of the commonwealth and 

 helpful in its administration. In bearing greetings of good will from 

 the South Dakota Academy of Science to the Kansas Academy of Science 

 on this your semicentennial anniversary, permit me to mention the honor- 

 able part your Academy has had in the extension of the boundaries of 

 knowledge and in making possible its useful application within your 

 state. Further, your Society has been as a mother to many young and 

 ambitious workers in science. With admiration for your achievements 

 and a desire to emulate them in her first fifty years, the youngest of the 

 state academies extends warmest greetings and best wishes for. the 

 future to the Kansas Academy, believing that despite her fullness of 

 years she is but on the threshold of a long and honorable career, to be 

 enriched by many discoveries of the highest order in science, conferring 

 blessings on the people of your state and contributing much to the prog- 

 ress of civilization. 



SOCIEDAD CIENTIFICA "ANTONIO ALZATE." 



Mexico, 7 de Marzo de 1918. 

 Sr. Secretario de la Kansas Acadcmrj of Science, Lawrence, Kan.: 



MUY Sr Mio — Esta Sociedad he recibido la atenta invitacion de Ud. 

 de fecha 15 de Febrero proximo pasedo, para que se haga representar en 

 la celebracion del Quincuagesimo Aniversario de la fundacion de esa 

 Academia, que tendra lugar en la Universidad de Kansas los dias 15 y 

 16 del presente. 



En la imposibilidad de nombrar una persona que concurra a esa in- 

 teresante ceremonia, debido a la premura del tiempo, la Sociedad se ve 

 privada de esa honora, y hance votos sinceros y fervientes por la 

 prosperidad y desarrollo de esa Academia. 



Envio a Ud. Sr. Secretario en nombre de la Sociedad, sus calurosas 

 felicitaciones, y me ofrezco su atento, afmo. g g 



R. Aguilar, Secretario. 



DIRECTION DE ESTUDIOS BIOLOGICOS. 



Mexico, Marzo 7, 1918. 

 Sr. Presidente de la Kansas Academy of Science, Laivrence, Kan.: 



Direction Estudios Biologicos dependiente de Secretaria Agricultura 

 y Fomento acepta agradecida invitacion enviar deligado mitin efectuarase 

 dias quince y diecise is actual para celebrar quincuagesimo aniversario 

 fundacion esa Academia y ruega a usted dignese reprentarla atenda- 

 mente. El Director de Estudios Biologicos, A. L. Herrera. 



GREETINGS FROM ABSENT MEMBERS. 



912 E. San Miguel St., 

 Colorado Springs, Colo., March 14, 1918. 

 To My Old-time Associates in the Kansas Academy of Science, and to All 

 Felloiv Members of the Academy, Greeting: 

 I much regret that I cannot be with you on this most interesting and 

 notable occasion, but I rejoice with you in the Academy's attainment of 

 that mature age at which it can celebrate its fiftieth annual meeting. 



The Academy may well feel proud of its achievements, not only in the 

 quantity of its published work, and in the scientific collections and library 

 it has built up, but also and especially in the stimulus immeasurable that 



