Helos , a town of ancient Greece, in the territory of Laconia, situated in a fertile plain near the Eurotas and the sea. Its foundation was ascribed to Helms, the youngest of the sons of Perseus, and in very early times it appears to have been the principal town of that region. On being taken by the Dorians, its inhabitants, as a punishment for the obstinacy of their resistance, were reduced to slavery, and their name, according to some writers, became in time the general designation of the Spartan bondmen. In the age of Strabo Helos had dwindled into a small village, and in that of Pausanias it was a heap of ruins. Its site was probably near Bizani, where there are some Hellenic remains. - Helos at the present day is the name of a district in the plains on the banks of the Eurotas, extending from the mountain of Bizani to the frontier of Maina. Most of the villages of the district are on the low hills which encircle the plain.
Helsingborg , a town of Sweden, in the lan and 32 m. N. N. W. of the town of Malmo, at the narrowest part of the Sound; pop. in 1871, 7,500. It lies just opposite Elsinore, with which there is regular communication. Several battles have been fought here, and several Swedish diets held.
Helsingor ,.See Elsinore.
Helvoetsluis, Or Hellevoetsluis a strongly fortified seaport town of the Netherlands, in the province of South Holland, on the island of Voorne, and on the Haringvleet and the Voorne canal, 6 m. S. of Briel; pop. in 1867, 8,810. It is a very important naval station, with large docks. Thousands of vessels enter the port annually, including the largest India-men, which pass through the Voorne canal on their way to Rotterdam. Helvoetsluis was in former times the great point of departure for English ports, and generally for Harwich; and William of Orange embarked here for England Nov. 1, 1688, with 50 war ships and 14,000 men.
Hematine , (Gr. blood), the coloring matter of the red globules of the blood. Hematine belongs to substances of the albuminoid class, consisting of carbon, hydrogen, nitrogen, and oxygen, with which is associated a small proportion of iron. It forms a little over 1 1/2 per cent. of the substance of the blood globules, but even in this small proportion is sufficient to communicate to them, and to the whole mass of the blood in which they are suspended, the strong and rich deep red color by which they are so readily distinguished. It is rapidly altered in hue by the action of chemical substances, and has not therefore been made available in the arts for the production of dye-stuffs. It is soluble in water, and a very small quantity of hematine will communicate a distinctly red tinge to a very large quantity of fluid.