geic

Mulder, it is composed of a number of organic bodies, and he has identified the following substances -- ulmin, humin, ulmic, humic, geic acids, &c.

Manures and the principles of manuring Charles Morton Aikman

The acids above named do not differ greatly in chemical characters, but they have been subdivided into the humic, geic, and crenic groups, which present some differences in properties and composition.

Elements of Agricultural Chemistry Thomas Anderson

When a soil is boiled with a solution of caustic potash, a deep brown fluid is obtained, from which acids precipitate a dark brown flocculent substance, consisting of a mixture of at least three different acids, to which the names of humic, ulmic, and geic acids have been applied.

Elements of Agricultural Chemistry Thomas Anderson

_ -- Mulder formerly believed another substance to exist in peat which he called _Gein_, and from this by the action of alkalies he supposed geic acid to be formed.

Peat and its Uses as Fertilizer and Fuel 1869

At one particular stage of the process it is converted into one or other of two substances, called humin and ulmin, both insoluble in alkalies, and apparently identical with the insoluble humus of the soil; but when the decomposition is more advanced the products become soluble in alkalies, and then contain humic, ulmic, and geic acids, and finally, by a still further progress, crenic and apocrenic acids are formed as the result of an oxidation occurring at certain periods of the decay.

Elements of Agricultural Chemistry Thomas Anderson