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76. water-colorist (water-kulor-ist), n. One who paints in water-colors. water-comparator (water-kompā-rā-tor), n . An apparatus for comparing thermometers with a standard, consisting e entially of a reservoir containing water, with means for obtaining different temperatures and for maintaining the whole ma at the same temperature during a series of observations. water-cooler (water-köʻler), n. Any device for cooling water; especially, a ve el with non-conducting walls in which water for drinking a is placed with ice. Such coolers are fitted with a faucet in the lower part, for drawing off the water. The effect of other coolers is due to evaporation through their porous walls. See olla , 3. water-core (wa'ter-kōr), n. 1. In founding , a hol- Clow core placed inside b the mold, within which a current of cold water can be made to pa to absorb the heat and hasten the cooling of the casting: used especially to cool the bore of cast guns.-2. In some forms of car-axle, a quantity of ducting filling; 6, inner shell. water in a hermetically closed cavity, intended to take up heat from the journals.-3. A blemish, common in some varieties of the apple, in which the flesh about the core a umes a watery, translucent appearance. Water-cooler. a, outer shell; b, non-con watercourse (water-kōrs), n. 1. A stream of water; a river or brook. The woods climb up boldly along the hillsides, overshadowing every little dingle and watercourse . Geikie, Geol. Sketches, iii. 2. A channel or canal made for the conveyance of water, or serving for conveyance by water. Who hath divided a watercourse for the overflowing of waters.