DRY 



SUPPLEMENT. 



ECH 



DRY BAROMETER. See ANEROID. of teu days. Dilute Condy's Fluid (the red 



DKY DISTILLATION, distillation of sub- fluid) taken internally, as prescribed tor 



Stances without the aid of water, or per se. drinking, destroys the yeast plant, and along 



Coal employed in the manufacture of gas is with due use of the bath has a very salutary 



an example of dry distillation : so is wood, : effect. 



when subjected to heat in a retort lor the : DYSPHAGIA, difficulty of swallowing. 



production of vinegar and other products of DYSPN<EA, difficulty of breathing. 



its destructive or dry distillation. | DYSUHIA, .YSUKY, difficulty in voiding 



DUENNA, the title of the principal lady urine. 



in waiting on the queens of Spain ; more 



commonly a lady occupying a position par- J 



taking partly of the character of governess 



*nd companion with a charge over the 



younger female members of families in the 



Peninsula. 



DULCAMARA, (Solarium Dulcamara,) the 

 woody nightshade. 



DUPLICATION OF TUE CUBE, (also called 

 the Delian Problem, g. .,) a problem re- 

 quiring the solution of a cubic equation, and 

 not admitting of solution by elementary 

 geometry. Hippocrates of Chios reduced it 

 to the insertion of two mean proportionals 

 between two given straight lines. This prob- 

 lem Archimedes, Eutocius, and other ancient 

 geometers found modes of constructing by 

 means of the higher curves. 



DUTCH LIQUID, an oily liquid product ol 

 the action of chlorine on olefiant gas. It is 

 the Chloride of Ethylene. 



DYNACTINOMETER, an instrument for de- 

 termining the intensity of light-producing or 

 photogenic rays, and ascertaining the power 



of object-glasses in optics. 



, the unit or 



standard of force employed in determining 

 the moveable power of machines. The Dy- 

 nams most recognised in practical engi- 

 neering is the unit of horse poiver, defined 

 ultimately by "Watt to be the force sufficient 

 to raise a weight of 32,000 Ibs avoirdupois 

 one foot high in one second of time. 



DYSPEPSIA, a form of indigestion causing 

 great inconvenience and annoyance to thos 

 who suffer from it. Its principal character- 

 istic, and that which appears to be the 

 fundamental mode of its development, is 

 fermentation of the food on the stomach 

 from weakness of the gastric fluids, allowing 

 the development of the yeast plant, abun- 

 dantly present in all human food, to gene- 

 rate the gases of fermentation, and cause 



nus excitement i 



irritation of the 



nervous system. That which suppresses 

 fermentation, therefore, and causes the 



EAGLE, BLACK, an order of knighthood 

 founded in Prussia in 1701, and conjoined 

 with that of the Red Eagle, called also the 

 Order of Sincerity, previously instituted by 

 the Margraves of Bayreuth. 



EAGLE WOOD, the Aglla of the Malays, 

 and Pao d'Agila of the Portuguese ; the 

 wood of Aloexylon Agallochum, burnt as 



incense for its fragrance. 

 EARTH NUTS, 



given to many- 



underground fruits and edible tubers, as the 

 Cyperus rotundus of Egypt, the under- 

 ground pods of Arachis hypogcea, China, 

 and of Amphicarpcea, Voandzeia, and other 

 plants ; and of the tubers of umbelliferous 

 Biinium Jiexuosum, and of cyperaceous 

 plants. 



EARTH SHINE, the reflection of sunlight 

 ihrown on the moon from the illuminated, 

 de of the earth. 



EARWIG, an insect belonging to the genus 

 Forficula of Li tin a' us. 



EAU DE JAVELLE, a solution of chloride 

 or hypochlorite oi soda, used for disinfecting 

 and bleaching. 



EBONITK, a compound resembling jet, 

 formed by a mixture of sulphur in vary- 

 ing proportions with caoutchouc or gutta- 

 percha. 



EBULLIOSCOPE, an instrument for testing 

 the strength of spirits of wine by the tem- 

 perature of their boiling point. 



ECBOLICS, remedies, justifiable only in the 

 most extreme cases, for hastening delivery 

 by exciting uterine contractions which expel 

 the foetus. Drastic purges and savin have 

 been reputed ecbolics, but ergot of rye is the 

 only really trustworthy remedy. No prac- 

 titioner, however, will resort to it while there 

 is a reasonable chance of nature doing its 

 wri work. 



ECCLESIOLOGY, a recent term, signifying 



food, after being operated upon as far as the church architecture and symbolism, with 

 power of the gastric fluids will allow, to be their subordinate arrangements and details, 

 discharged in tne usual way, is the best I ECCOPROTICS, an old name given to mild 

 mode of alleviating the effects and suppress- aperient medicines. 



ing the operation or development ofj ECDYSIS, casting or changing of the skin, 

 dyspepsia. If the food be allowed to go on ; ECHIDNA, a mythological being with the 

 fermenting, it will remain frequently so body and upper proportions of a man, and 

 long in the stomach that it becomes almost the lower extremities like the posterior 

 entirely discharged in the form of gas, and extremities of a serpent. The name is also 

 persons have been known to be for years given to an Australian quadruped resembling 

 suffering in this condition without action of the ant-eater, but covered with spines, and 

 *lie bowels more frequently than at intervals belonging to the order Monotrema. 



787 3 E 3 



