CON EAN 1S. 
Part I.—LABORATORY WORK, PHYSIOLOGICAL AND EXPERIMENTAL. 
CHAPTHR GIG RNER ATG REMARKS i seit ee Mae wii 0) hl SA Wie oe Lal 
The vital principle—Cellular and chemical ee RIC GUO e elete Beh a Teed 
General relations of the seed and plant to the air and the soil_________.- 
Importance of climatic laboratories (De Candolle) __._____ ___________. 
CLE ITE STAR IS Cai 248 OSM (0s a ne <M 
Influence of uniform temperature on germination of seed (De Candolle) - 
Influence of temperature and moisture on germination (Sturtevant) __- 
Influence of light and heat on germination (Pauchon) ___.___________- 
CHAPTER SMe HMPA cn NPI ATURE Ol” TEE) SOU te. oes see ae 222 Ses te 
Observations at Houghton Farm and Geneva, N. Y., by Penhallow __- 
Obsenvationsiby Got 2.8 oe nt Nel ee ale ee eae lie SEL 2 od 
Observations of temperature of manured soils in Japan by Georgeson - 
Influence of rain on temperature of the soil at Munich (K. Singer) ___- 
Soil temperatures as affected by surface slope and covering (Wollny) _- 
Soil temperatures observed at Greenwich, England __________.___-__-- 
Soil temperatures observed at Brookings, S. Dak____ ______- by ee ST EAR 
Soil temperatures observed at Auburn, Ala___.____________..__..___-- 
Soil temperatures observed at Pendleton, Oreg___-_.-___----------..-- 
Soil temperatures observed at Montreal, Canada ___._....___.________- 
Methods of measuring soil temperatures (Whitney; Emory; Menden- 
LOIN) ares Plage 20 a MIE ae OS et on een A 2 OR oy A an DOA ch id AE 
CHAPTER IV. THE INFLUENCE OF SUNSHINE ON ASSIMILATION AND TRANS- 
IP DRUACLT O Niet ee ye hee ene RR Leen: 1S ot Rul EN ast eG PA Aer at So as 
Chemistry of assimilation (Abbott) _......._...._---- Se Rees SPM nee 
Sunshine and transpiration (Marié-Davy; Deherain) ---.__------_----- 
Annual distribution of sunshine (Humboldt) _._________________--- en 
Total quantity of heat required to ripen grain (Boussingault)-_______- 
The sunshine and heat required to ripen grain (Tisserand) __________- 
The sunshine and heat required to form chiorophyl (Marié-Davy) --__- 
Influence of absorbent media on chlorophyl (Engelmann) ___________- 
Imiuenceoithe supply of sap (luaurent) =2225---2 222-8 2.222) 7 2 ee 
Climate and the location of chlorophyl cells (Guntz)_.________________- 
The influence of cloud and fog (Marié-Davy) -_----------------------- 
Influence of shade on development (Hellriegel) _____.- __.__.---------- 
Influence of long and short waves of light (Véchting; Sachs) --------- 
Influence of dryness and sunlight on development of tubers (Knight; 
Te aaySrey aie OMI: NVR 05 Da ie) eek Nes eens RE Ne pene © ea a 
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