Two Camiiosco Instruments 



32-254 TRANSPIRATION App. 

 Detmer P. 214. 



Garreau's 



To determine the amount of transpiration 

 from the upper and lower sides of a leaf at 

 the same time. Complete, . . . $4.50 



32-256 TRANSPIRATION CHAMBER, 

 Dclmcr, P. 219. 



To show that the amount of transpiration 

 depends upon the degree of moisture in the 

 air and that a rising temperature accelerates 

 32-2S4 transpiration. The m/e of transpiration in (/ry 32.256 



air and in moist is easily determined. Without burner or thermometer, $5.00. 



SEE Botanical Catalog, 91, P. 49, for complete information. 



CAMBRIDGE BOTANICAL SUPPLY COMPANY 



WAVEKLKY, MASS. 



Leading American Makers of Physiological Apparatus 

 Laboratory Equipment for all the Sciences 



HsinhlisluMl ISSl Catalogue Free Mention Plan* World 



ll 



University of Colorado l^ountain Laboratory 



Located at Tolland, Colorado, in the Rocky Mountains in an 

 open park surrounded by coniferous forest. Rich and varied 

 flora from foothills to alpine i)eaks easily accessible. 



Courses in Field Botany and Field Zoology; especially taxonomy 

 oi seed i)lants. Work suitable for high-school and college 

 instructors in botany or zoology. No elementary students 

 received. 



Ninth Annual Session June 25 to August 4, 1917. Fees 

 moderate. Expenses reasonable. An ojiportunity to learn 

 much with little expenditure of time and money. 



Additional Information may be obtained by addressing 

 Professor Francis Ramaley, University of Colorado, Boulder, 

 Colorado. 



