CHAP. IV.] ST. THOMAS TO BERMUDAS. 327 
SOIL IV.—CORAL. SOIL V.—CHALK. 
( Hygroscopic water. 0°316 ( Hygroscopic water. 187134 
Organic substance. 3°806 Organic substance. 3°961 
SENG oe pigoco perc 0-050 Sand. . Secs 107040 
Sesquioxide of iron Lo. 590 Shigdioside of iron ) 1-080 
Alumina.. fet Alumina.. eae. 
Completely | Lime............ he 470 | Completely | Lime............ 48°355 
soluble in | Magnesia........ 1:686| soluble in | Magnesia........ 0°638 
dilute acetic ; Potash.......... 0:064 | dilute acetic + Potash.......... 0-074 
acid. Sod aire eisterci« euerele 0243 acid. SOU Aerereteieye ei eaieiere 0:059 
(1 to 4.) Carbonic acid. ... 42°866} (1 to 4.) Carbonic acid... . 35°912 
Sulphuric acid.... 0°206 Sulphuric acid.... Trace 
Chlorine se. 0020 Chlorine. . 0:010 
Phosphoric acid Phospibnie heid 
(est. in nitric (est. in nitric 
acid solution)... 0°07 acid solution)... 0°105 
102°324 102°478 
EXHAUSTED AND FERTILE SOILS. 
Analyses of Soil from Plot 3 and Plot 2 of the Experimental Farm of Lawes and Gilbert, at 
Rothamsted. By Herman and Liebig. 
Prior 3.—An exhausted soil, having grown wheat thirty successive years without manure, 
corn and straw being carried off. (The permanently unmanured plot.) 
Prior 2.—A fertile soil. This has also grown wheat thirty successive years. The corn and 
straw have been carted off, and it has been highly mannured each year with farm-yard manure. 
Surrace Sor (Top nine inches). Prior 3. Pror 2. 
i | Exhausted | Fertile 
Constituents Estimated. Soil Soil 
Per Cent. Per Cent. 
BN EIOCNO WES os co pooenapecaccone || IAS) 1-810 
OraaniesSuStanen aps vetsele ele eels i-ielate 5°363 6°212 
Silici@racl dhe sp Hersscorsiceneyenete os pease sige 0-065 0-084 
Oxide of iron and alumina.............| 0°100 0-116 
Soluble in dilute TAM CS ye se eerie ce Sete ee ean IE eOOO 1-785 
acetic acid. EYES sca ube ouciocesmecese cac.cd | WUPI (KOR 
We otasHet yc yon sa See tetera h al OES | aro 
SOM Aerie us romsict Kenevocncre heuer ion meineie re 0:012 0°019 
SUI MAO HG Gocsadugcds DD aace coome Traces | 0-008 
[ Phosphoric acid (in nitric acid)......... 0-075 0-093 
Sildeieracidss cite. ps asad che aetevelee oes 07369 
Gatanledn dilate Gride OF RON ANGLING .5 ogee bound 2 4°363 
: : LDV OT Ce) eter ages We ere cua r cr Glan aa Cri 0:233 
hydrochloric acid 3 
eeaesie colton MAGNESIA corr arsloieisn sciaie SeuarenNke oro 0064 
se aes IP OLAS regan, s ccnereeceuciece Guise Arne ee et OOO 
SOdavah sytem sh Hee exh awe hte 0-054 
Stl FMA CGC, So Aooind oo ae obama 0-015 
