PRICE LIST OF 



ATMOMETER CUPS and OTHER APPARATUS 



Prices in Effect April 1st, 1919 



//( placing telegraphic orders the list numbers may be used 



List Xo. Price each Price per ten 



1 Natural Cylindrical Cups, no number, no coating (3 x 13 



cm.) $0.60 $5.00 



lA Standardized Cylindrical Cups (3 x 13 cm.) 1 .40 11 .00 



IB Unstandardized Cylindrical Cups, numbered and coated 



(3x13 cm.) ^ 1 .00 9 .00 



2 Porous Cones for auto-irrigator, lateral surface ground 



(7.5x10 cm.) 90 8.00 



2A Porous Cones, bottom waterproofed 1 .25 12 .00 



3 Black Spherical Atmometer Cups, unstandardized (diam. 



5 cm.) 3.40 33.00 



3A Black Spherical Atmometer Cups, Standardized 3 .80 35 00 



4 Used cylindrical cups and Seconds (when in stock) .50 4 .50 



5 Bellani Plates (porous disc surmounting a glazed hemi- 



spherical funnel) unstandardized diam. 7.5 cm.) unstand- 

 ardized 2 .50 24 .00 



5A Bellani Plates, standardized 2 .75 26 .00 



6 White Spherical Atmometer Cups, with glazed neck (diam. 



5 cm.) unstandardized 2 .25 20 .00 



6A White Spherical Atmometer Cups, Standardized 2.75 25.00 



7 Transaeu Vaporimeter Cups (1.5x25 cm.), no number, no 



coating _..._. .60 5 .00 



8 Large Cylindrical Cups (5x35 cm.) for use as Auto-irri- 



gators ._ . _. .80 7 .00 



17 Rotating Table, for standardizing Atmometers or equalizing 



conditions for growing plants or experimental cultures 



(diam. 4 ft.) 35.00 



18 Tops for Rotating Tables, 3-p!y painted 6 .50 



19 Iron tripods for Rotating Tables, painted 11 .00 



20C Shive Non-Absorbing Atmometer Mounting (without cup) 



^ for use with Cylindrical Cup 6 .00 55 .00 



20S Shive Non-Absorbing Atmometer Mounting (without cup) 



for use with Spherical Cup 6 .00 55 .00 



22 Pans for determining water-retaining power of soils 1.50 14.00 



23 Leaf Clips for Cobalt Paper Transpiration Method .30 2.50 



24 Selected Cobalt Paper for Transpiration Method. Circles 



11 cm. in diam 30 2 .50 



25 Tripartite Cobalt Paper Slips 10 .90 



30 MacDougal Direct-Reading Precision Auxograph 75 .00 



31 Light Filters. Red plates of heavy glass (6 x 6 in.) 1.75 15.00 



32 Light Filters. Blue Plates .' 1 .75 15 .00 



33 Light Filters. Orange Plates 1.75 15 00 



34 Light Filters. Heat-Absorbing Plates. Absorb 97% of 



the heat of a Nernst lamp 2 .00 18 00 



35 Light Filters, Uviol Plates, transmitting ultra-violet light. . 2.00 18.00 



Restandardizing Atmometer Cups .40 4 00 



Cleaning Atmometer Cups .40 4 .00 



Cleaning and Restandardizing Atmometer Cups .70 7 .00 



Restandardizing, cleaning and again standardizing At- 

 mometer Cups 1 .00 10 .00 



Please notify us before shipping cups for restandardization. 



Eastern orders may be addressed to Laboratory of Plant Physiology, Johns Hopkins 

 University, Baltimore, Md. 



Further information regarding any of the above item-i will be furnished on application. 



THE PLANT WORLD TUCSON, ARIZONA 



