PART FIRST.
PHOSPHATES AND PHOSPHATIC FERTILIZERS.
_Introduction_, pp. 1-4.—Natural fertilizers; Waste matters as
fertilizing materials; Valuation of fertilizing ingredients.
_General Analytical Processes_, pp. 4-15.—Taking samples;
Fertilizing minerals; Mixed fertilizers; French methods of taking
samples; Sampling stable manures; Preparation of sample in laboratory;
French and German methods; Drying fertilizer samples; Moisture in acid
phosphates.
_Analysis of Mineral Phosphates_, pp. 15-39.—Constituents to be
determined; Direct estimation of phosphoric acid; Official method;
Preparation of solution; Use of tartaric acid; Determination of water
and organic matters; Carbon dioxid; Soluble and insoluble matter;
Silica and insoluble bodies; Estimation of lime; Ammonium oxalate
method; Immendorff method; Estimation of iron and alumina; The acetate
and Hess methods; Methods of Jones and Crispo; Geological Survey
method; Method of Marioni and Fasselli; Method of Krug and McElroy;
Method of Wyatt; Estimation of magnesia; of sulfuric acid; of fluorin.
_General Methods for Phosphoric Acid_, pp. 39-57.—Preliminary
considerations; Estimation as stannic phosphate; Water soluble
acid; Citrate insoluble acid; Total phosphoric acid; Norwegian
methods; German experiment station methods; Soluble phosphoric acid;
Swedish methods; Dutch methods; Errors in molybdate method; Color of
pyrophosphate; Solution in sulfuric acid.
_The Citrate Method_, pp. 57-70.—General principles; Halle
method; Swedish method; Methods adopted at the Brussels Congress; Dutch
method for citrate soluble acid; Comparative accuracy of citrate and
molybdate methods.
_Basic Phosphatic Slags_, pp. 70-86.—History and manufacture;
Composition; Molecular structure; Solubility; Separation and solution;
Estimation of total acid; Alternate method; Halle method of analysis;
Dutch method; Estimation of citrate soluble acid in basic slags;
Wagner’s shaking and digesting apparatus; Estimation of caustic lime in
slags; Detection of adulteration.
_Volumetric Determination of Phosphoric Acid_, pp.
86-106.—Classification of methods; Uranium method; Preparation of
sample; Precipitation of the phosphoric acid by magnesium citrate;
Composition of magnesium citrate solution; Solution of ammonium
magnesium phosphate; Preparation of standard solutions; Verifying
standard solutions; Conduct of the analysis; Phosphoric acid in
superphosphates; Determination of soluble and reverted phosphoric acid;
Conclusions.
_Titration of the Yellow Precipitate_, pp. 106-118.—Pemberton’s
method; Conduct of the analysis; Reactions; Calculation of results;
Comparison with Official method; Titration as a lead compound; Water
soluble acid; Estimation of phosphoric acid in presence of a large
excess of iron; Emmerton method; Method of Dudley and Noyes; The Jones
reductor; The volumetric silver method.
_Technical Determination of Phosphoric Acid_, pp.
118-125.—Desirability of methods; Reagents employed; Conduct of the
molybdenum method; Conduct of the citrate method; Treatment of mineral
phosphates and basic slags; Analysis of superphosphates.
_Miscellaneous Notes on Phosphates and Phosphatic Fertilizers_,
pp. 126-150.—Time required for precipitation; Examination of the
pyrophosphate; Iodin in phosphates; Chromium in phosphates; Estimation
of Vanadium; Fluorin in bones; Note on separation of iron and alumina
from phosphoric acid; Ammonium citrate soluble acid; Influence of
time and strength of solvent on solution; Arbitrary Determination of
reverted phosphoric acid; Digestion apparatus of Huston; Huston’s
mechanical stirrer; Citrate method with small percentage of phosphoric
acid; Direct precipitation of the citrate soluble phosphoric acid;
Availability of phosphatic fertilizers; Direct weighing of the
molybdenum precipitate.
_Chemistry of the Manufacture of Superphosphates_, pp.
150-156.—Reactions with phosphates; with fluorids; with carbonates;
with iron and alumina; with magnesium compounds; Determination of
quantity of sulfuric acid; Phosphoric acid superphosphates; Authorities
cited in Part First.
PART SECOND.
NITROGEN IN FERTILIZERS AND FERTILIZING MATERIALS.
_Kinds of Nitrogen in Fertilizers_, pp. 161-169.—Determination of
state of combination; Microscopic examination; Seeds and seed residues;
Fish scrap; Dried blood and tankage; Horn, hoof, and hair; Ammoniacal
nitrogen; Nitrogen in guanos; Nitric nitrogen.
_Methods of Analysis_, pp. 169-192.—Classification of methods;
Official methods; Combustion in copper oxid; Official volumetric
method; Mercury pump; Combustion furnace; Process of combustion; Method
of Johnson and Jenkins; Calculating results; Reading barometer; Tension
of aqueous vapor; Aqueous tension in solutions of potassium hydroxid;
Tables for calculating results; Soda-lime process; Official French
method; The ruffle soda-lime method; Official ruffle method; Boyer’s
ruffle method.
_Moist Combustion Process_, pp. 192-220.—Historical; Method of
Kjeldahl; Theory of the reactions; Preparation of reagents; Dutch
kjeldahl method; Halle kjeldahl method; Official kjeldahl method;
Distillation apparatus; Patrick’s distilling flask; Modification of
the kjeldahl process; Method of Wilfarth; Method of Asboth; Method of
Jodlbaur; Dutch jodlbaur method; Halle jodlbaur method; Official method
for nitric nitrogen; Method of Scovell; Gunning method; Reactions of
the gunning method; Official gunning method; Gunning method adapted to
nitrates.
_Determination of Nitrogen in Definite Forms of Combination_,
pp. 221-231.—Introductory considerations; Nitrogen as ammonia;
Method of Boussingault; Determination of thiocyanates; Separation of
albuminoid nitrogen; Separation of nitric nitrogen; Separation of
ammoniacal nitrogen; Ulsch method for mixed fertilizers; Method of
Schlöesing-Wagner; Schmitt’s modified method; Krüger’s method.
_Sodium Nitrate_, pp. 231-247.—Functions of sodium nitrate;
Commercial forms of Chile saltpeter; Percentage of nitrogen in Chile
saltpeter; Adulteration of Chile saltpeter; The Halle zinc-iron method
for estimating nitrogen in Chile saltpeter; French method; Gantter’s
volumetric method; Method of difference; Application of Chile saltpeter
to the soil; Taking samples of soil to determine nitric nitrogen; The
nitrifiable solution; Quantity of Chile saltpeter per acre; Consumption
of Chile saltpeter; Authorities cited in Part Second.