V. 1 gramme is digested for two hours, at a temperature just below the boiling point, with 100 cubic centimeters of a solution containing 5 _per cent._ of crystallized carbonate of soda. It is then removed from the sand bath and allowed to settle. When the supernatant liquid has become perfectly transparent, it is carefully decanted. This operation is repeated until all the organic matter soluble in this menstruum is removed; which is accomplished as soon as the carbonate of soda solution comes off colorless. The residue, which is to be washed with boiling water until the washings no longer affect test papers, is thrown upon a tared filter, and dried at 212 degrees. It is the _total amount of organic and inorganic matter insoluble in carbonate of soda_. The loss that it suffers upon ignition, indicates the amount of _organic matter_, the ash gives the _inorganic_ matter. NOTE.--The time required to insure perfect settling after digesting with carbonate of soda solution, varies, with different peats, from 24 hours to several days. With proper care, the results obtained are very satisfactory. Two analyses of No. 6, executed at different times, gave _total insoluble in carbonate of soda_--1st analysis 23.20 _per cent._; 2d analysis 23.45 _per cent._ These residues yielded respectively 14.30 and 14.15 _per cent._ of ash. VI. The quantity of _organic matter insoluble in water but soluble in solution of carbonate of soda_, is ascertained by deducting the joint weight of the amounts soluble in water, and insoluble in carbonate of soda, from the total amount of organic matter present. The _inorganic matter insoluble in water, but soluble in carbonate of soda_, is determined by deducting the joint weight of the amounts of inorganic matter soluble in water, and insoluble in carbonate of soda, from the total inorganic matter. VII. The amount of nitrogen is estimated by the combustion of 1 gramme with soda-lime in an iron tube, collection of the ammonia in a standard solution of sulphuric acid, and determination of the residual free acid by an equivalent solution of caustic potash and a few drops of tincture of cochineal as an indicator. The results of the analyses are given in the following Tables. Table I. gives the direct results of analysis. In Table II. the analyses are calculated on dry matter, and the nitrogen upon the organic matters. Table III. gives a condensed statement of the external characters and agricultural value[9] of the samples in their different localities, and the names of the parties supplying them. TABLE I.-COMPOSITION OF CONNECTICUT PEATS AND MUCKS. KEY: A - _Soluble in water._ B - _Insol. in water, but soluble in carbonate of soda._ C - _Insol. in water and carbonate of soda._ D - _Total._ E - _Water._ F - _Nitrogen._ G - _Total matters soluble in water._