— 241 — 



Method 



Plant 



Light 



Tempera- 

 ture 



G0 2 

 assimil. 

 pr. 50 cm 2 

 pr. hour 



Half leaf 

 method 



Estimation 

 from the 

 product, of 

 dry matter 



Air current 

 method 



Helianthus 

 Cucurbita . 



Nymphaea 

 Rumex 

 Petasites . , 

 Helianthus 

 Nicotiana . 

 Tulipa 

 Arum 

 Colchicum . 

 Allium . . . 



Helianthus 

 Catalpa . . . 



Tropæolum majus 

 Phaseol. multifl. . 

 Ricinus comm. . . 

 Helianthus ann. . , 



Helianthus (Wage' 

 ningen) 



Nicotiana (Wage 

 ningen) , 



Helianthus 



Cassia .... 



Cedrela .... 



Nicotiana . 



Acalypha . . 



Helianthus 

 Tropæolum 



Catalpa 



Polygonum Weyri- 



chii 



Sinapis alba 



Senecio silv 



Rumex acetos 



Sambuc nigra (sun 

 leaves) 



Sunshine 



The 

 illumination 

 changing 



Sunshine 



The 

 illumination 

 changing 



The 

 illumination 

 changing 



Diffuse light 

 Sunlight with 

 canvas screen 



Intermittent 



sunshine 

 Sunlight with 

 canvas screen 



Excess of light 

 at20°andwith 

 a CO a content 

 of 0.65 mg 

 pr. 1. 



25 c 

 24< 



about 27-29 c 



13—27° 



12—29° 

 28—36° 

 28—35° 

 28—34° 

 31—35° 

 33—35° 



ca. 20° 

 20—25° 



ca. 20° 

 ca. 20° 



20° 

 20° 

 20° 



20° 



13 

 11 



18 

 17 

 15 

 14 



10 

 10 

 8 

 9 

 9 



13 

 4 



3.3 

 2.4 

 3.9 

 4.1 



2.9 



2.2 

 3.8-4.0 

 6.1 

 4.5 

 4.5 

 3.5 



3.4 

 1.7 



3.0 

 3.8 



6.0 

 4.5 

 2.3 



