486] RES face, so that either extreme scarcity or superfluity is the necessary re- sult. With a view to remedy these inconveniencies in such soils, it has been proposed to form reservoirs of any depth, and breadth, that may behest adapted to the purpose j and, as duiing the heat of summer, the water would be absorbed to the depth of eight or nine inches, this diminution of its volume may be obviated, by raising the top so many inches higher than might otherwise be found expedient. Farther, such reservoirs may communicate, by n'lea'ns of subterraneous pipes or channels,' with some rivulet or brook, that in summer is nearly dry ; but which in the winter is swoln into torrents. In conse- quence of thesehydraulic measures, a regular supply of water will be obtained at all seasons, for the irri- gation of fields or meadows ; and also for turning mills, or other ma- chinery, where a certain velocity is required ; so that the extensive da- mage frequently occasioned by sudden floods, will thus be etfedu- ally prevented. RESIN, a viscid, tenacious juice, ■which either exudes naturally, or is obtained by incision, from differ- ent trees, and shrubs, such as the pine, fir, &c. It is somewhat trans- parent, hard and brittle, possesses a disagreeable taste ; and is not so- luble in water ; though it may, in j;eneral, be dissolved in spirit of wine, and also in expressed and es- sential oils. There are numercwis resins, ob- tained from various trees, which difier in taste, colour, smell and consistence. Such are the Com- inon Resin, Pitch, Mastich, Lab- danum, Guaiacum, &c. 3 the pro- perties of which are stated iii their alphabetical series. REV Considerable quantities of Com^ mon Resin aie employed by salt- boilers, in combination with wheat- en flour, to render tlie grain of salt smaller ; and likewise by musical instrument makers, and musicians, for elfeding greater vibrations by the bows of violins. — It has farther been conjedtured, that resin might be so prepared, as to adapt it to the purposes of making candles. The Society for the Encouragement of Arts, &c. has accordingly olfered premiums, several years successive- ly ; but no method of etfc;tting such objeft has hitherto been dis- covered. — See Candles. Resolvents : See Attenu- ANTS-. Respiration: 'See Breath- ing. REST-HARROW, the Thor- ny, Cammock, Petty-Whin, or Ground-Furze ; Ononis spinosa, L. (the arvtfisis of Dr. Smith) an indigenous perennial plant j growing on barren pastures, hedge- banks, and paths ; it flowers in the montli of July. — I'he young shoots of this plant may be boiled and eaten iiraong culinary vegetables. Dr. Withering remarks, that a deco6tion of the roots has been re- commended in cases of the stone and jaundice. — Cows and goats eat the Rest-harrow ; though sheep do not relish it, and it is refused by horses and hogs. REVENGE, is one of the most detestable passions that torment the human breast, and which consists in a vindiftive desire of avenging real or imiaginary wrongs. It widely difi'ers from the transient or sudden resentment or indigna- tion we feel at the first perception of an injury J and whch, if ' it do not exceed the limits of modera- tion^ is often commendable, nay, sonic^
