Two Cambosco Instruments 



32-254 TRANSPIRATION App. Ganeau's 

 Detmer P. 214. 



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, 



Detmer, P. 219. 



To show that the amount of transpiration 



/ -va. depends upon the degree of moisture in the 



/ ^°*-^**- '^\ air and that a rising temperature accelerates 



32-254 transpiration. The m/e of transpiration in (ir); 32.255 



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 



WAVERLEY, MASS. 



Leading American Makers of Physiological Apparatus 

 Labpratory Equipment for all the Sciences 



Established 1884 Catalogue Free Mention Plant World 



University of Colorado Mountain 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 peaks easily accessible. 



Courses in Field Botany and Field Zoology; especially taxonomy 

 of seed plants. 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 opportunity 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. 



