95 



3e«d.r<f\q Tcnv. 



^PRESENTATION PtfllOD 

 fLATINT PeHlOO 



I T«rwp TJiSC ZPr^. 



April 20.1^13 



/6 /S io ' it av 26 MINUTES 



Fi?. IV. Study of Avena saliva. 



The ventilation of the box is unimpovtant for the short periods required 

 for eacli study. A wet sponge placed inside of the box serves to lieep the 

 air moist. The temperature of the apparatus can also be recorded and all 

 tests made under ecputemporatures. 



Fig. I. External View of Apparatus. 



