CONTENTS 
PAGE 
SL LSS CISUTEIVG(0 LS 2-2 6 ee sea ee cla 480 
|, SUEa SBS) TTC SSS Ye ete ae ar arp ae 481 
7: 1 LIENERT oS a ae a 484 
Eummarveomiterature Cited. 2... hae oe eee 490 
Ly EisCheiLl SCO Ec Se ae ee a 491 
MNURSNMEOIBINEH NOUS: 2256. 2. ce le tee he 491 
MIO MSMISeM eb MIs Works. 28 eg kl es 496 
Experiments with artificially prepared colloids................. 499 
eeretprmeccll cm sodine et oso ie. 22 See c-w a e ehh 501 
Effect of various factors on hygroscopicity.................-.. 503 
Dye-adsorption experiments........ MON Metee Fr 2 etree Nat ot eae te 509 
“LS TASH OIE GS OETA O25 1 Se ce 515 
PEE OM AME MIOTINMEMUS... So. i. Soe betes es ce ie he bee es 515 
eecumedinature of soil colloids... .3.5 2. a oe ee eee Gul 
ETT ccc ac 2.5 5 DSSS R EER RSIS RRR Ti tO cee a a 518 
RR PTE LET TOSI SN ct ge a IMS RO ia es 2 ek vo aled a ee Ee 520 
Minteteetistie: eel 6 iwiatis! ofelleu sis) iol oe. \e._» “slveve-je se he).0) © sieve «ve le) oe a |e 0)c0)\e\8,) 00 160" ,0 
