. Sands, 7her variation in sandy lands; narmally they 



are free fror> larger stoneo. Pefore t2ivi>u5 analyses of some sandy ooils 



> veil to say a "?ord n.~: LO the oi~e of the. idea (textur 

 of these vnriouu mat I. Coacae ^rit is 1-3 torn* in : .er; ordi- 

 nary sand is 0,1-1 BM or 100-1000 microns; ailt is 0.01-0.1 nsm or 10- 

 100 microns; Band ia 100-1000 microns. The best known classification is 

 tint of the -..'nil. reau oi ".oils, as follov?a: 



Fine gravel 2,000-1.000 millimeters (mi.} 



'Joarae sand (a) 1. 000-0. b'OO im, 



'liugi sand jbj OoOC-0.^0 ram. 



110 sand (c) 0,2^'O-O.IQO mm. 



I'ine sand (d) 0. 100-0. O^'O m; . 



It 0.0 r ;o-0.005 rnm. 



0,005-0,000 QU. 



A classification given by i rof eseor iiot)i i8 ae follows: 

 it ft. 0-3, 00 ram. 



id (a) O.J-1.0'. 



id (b) 0.3 EBB. 



;d (c) 0.1^-0.16 n . 



It (a) 0.0? mra. 



It (b) (qunrtz) 0.01 j$eu 

 Clay ---- 



is latter classification is the on referred to in the follow- 

 ing samples of aoils from the ikmthorn pinery on: 



Sample 1: t ;rit 7; ; sands: a) l r /;:, b)19^ t c)10/ ; silt 35^; clay 



;t sand 



In icaking these sample analyses they used sieves for the fine 

 particles, and water for clay. The particles are classified by the 



y take to fall t'aru a certain distance in tlie water. Dumrnlng up 

 sample, we notice that the Bands form 57;.", silt 35/ f and clay L . 



2: grit 3/ ; sands: 7/ 3; , ^/ , ^-' silt 69,; clay E . 



Sample 3: grit 4^. f ; aands: 0.8; , O;., 6/ , 4>.; silt 69; ; clay 4 . 



7e have had much sand and little clay. Finer sands vary 



much in wide limits even in the sr*mo neighborhood, silt or quartz varye 

 to 70.. . 



In making the analyses the grit io sifted thru different sized 

 raeahea to separate it. Clay settles in water about i> iuchea per day. 



^d. Loam soils. Loain is a combination of sand and ci?;y. 

 Saraplea: 1 



.nd 1'j/ A/ 



Silt (fine) 6Z/ 62; W 



Silt (coaraeryBx I// 



Clay IO/ 17>^ 1 



The clay here forma about 10- 20^ of tlie loam. Silt preaoininatea. 



S.. Clay soils. 'Die following is^an average of several clays: 

 Clay proper forma 2^-- 

 3ilt " 24-3; 



nd " 1- 



Oxidee (hurnua)** tterin^* KeO, etc. 



even in clay soil, the clay doen not form tlto bulk of the 

 soil. 



