Mulder, it is composed of a number of organic bodies, and he has identified the following substances -- ulmin, humin, ulmic, humic, geic acids, &c.    From Wordnik.com.  [Manures and the principles of manuring] Reference

The substance exuding from the bark is called ulmin.    From Wordnik.com.  [Resources of the Southern Fields and Forests, Medical, Economical, and Agricultural. Being also a Medical Botany of the Confederate States; with Practical Information on the Useful Properties of the Trees, Plants, and Shrubs] Reference

Cerato-ulmin, a wilting toxin of Ceratocystis ulmi: development of antiserum against the toxin.    From Wordnik.com.  [xml's Blinklist.com] Reference

After extracting the peat with solution of carbonate of soda, it still contains ulmin or humin.    From Wordnik.com.  [Peat and its Uses as Fertilizer and Fuel] Reference

L.T. Meade (Mrs. Elizabeth T.omasina Smith), English novelist, was born at Bandon, County Cork, Ireland, 1854, the daughter of R.v.R. T. Meade, rector at Novohal, County Cork, and married T.ulmin Smith in 1879.    From Wordnik.com.  [Girls of the Forest] Reference