DIA SUPPLEMENT. DIS 



DIAPHRAGM SHELLS, shells made with 1 any organ one half of which .l.K> reduced la 

 interior divisions, as the Shrapnel shell. as to appear to be wanting. 



, the upper transverse pro- 

 of the cervical 



c<-ss 



of mammals. 



DIASPOKE, a native hydrate of alumina 



DiuoKPHiNE, orpiment found with real- 

 gar on Vesuvius. This name was given by 

 Scacchi in error. 



I DIMORPHISM, the power of acquiring two 

 rystalline forms. 



DIMOHPHODON, a genus of fossil ptero- 

 faurian reptiles, found in the lower lias of 



DIATOMA, a genus of low organised Algss, 

 sonta'iiing a very large quaiitity of silex. 



DiAT<)MACE, the group of Algse of 

 which Diatoma is the leading genus. The 



D, ATHEK u ANGUS, synonymous with D,A- ^^ of Dlo , CIOC8f naving the Sexe8 



in different flowers of different individuals, 

 in botany. 



DIONYSIUS, a synonym of Bacchus or 

 lacchus ; whence the Dlonysia, or Baccha- 



8 i 1 iceorremarnsofthe^ plants form the Dalian festivals, at which the dramatic re- 

 beds of Tripoli, from which the well known : presentations were produced, 

 polishing material is obtained. They also!. ^ OS ^'' ^Z^u'o^Bu'cka 

 form the Berg meal or mountain meal of,m the leaves of Bucku 01 Bucka. 

 Sweden, which has been frequently resorted DIPHTHERIA a disease attacking the 

 to in times of scarcity as an article of food, [throat, characterised by the lo.maUou of a 

 They are capable of enduring very hi s h tern- 1 removable membrane, and in se nous cases, 

 perature and also the utmost extremes of unfortunately the most frequent ot oecur- 



Arctic cold without injury to their vitality. 

 DICE COAL, a coal which breaks readily 

 into cubical pieces. 



reiice, proceeding otten with such rapidity 

 that suffocation takes place in a, very short 

 time. The most effective remedy hitherto 



plants 



.**> 



rine replaces two equivalents of hydrogen. turn of the membrane in the throat and 



DICLINOUS, plants having their pistils destroys its vitality. (From Ol(J)fepa, 



in separate flowers or in separate plants from a s kj n or membrane.") 



their stamens. DIPLEIDOSCOPE, an instrument for indi- 



DICOMFOUNDS, a term applied to certain eating the passage of any heavenly body 



compounds, as dichloride of mercury, di- across the meridian by the concurrence of 



carbonate of copper, to indicate that they two images of the body produced by single 



have two atoms of the base or electro-positive an( j double reflection. 



DIPLOPIA. See DIPLOPY. 



DIPPER, the water-ouzel and some other 

 species of Cinclus. 



DIPTERAL, temples with a double row of 

 columns on each of their flanks. 



DJPTOTE, nouns with only two cases. 



DIRIGKNTS, certain medical ingredients 

 .intended in old prescriptions to direct the 

 operation of the chief remedial medicine 



element to one of the electro-negative ; as 

 two of mercury to one of chlorine, &c. 



DICTYOPHYLLUM, any ordinary reticu- 

 lated fossil leaf. 



DIDUS, the genus Dodo, recently extinct. 



DIDYMIUM, a primary metallic element. 

 It was found a-sociated with cerium in the 

 mineral Cerite. 



DIDYMOUS, growing in pairs. 



DIDYNAMOUS, flowers with four stamens, au d its application to the place affected, 

 two of which are shorter than the other DIRT BED, a geological deposit in the 

 pair. Upper Oolite of England, and in some of 



DIGASTRIC MUSCLE, the d .ur-le muscle the Coal Measures ot British North America, 

 between the lower jaw and mastoid piocess. DISCOID, univalve shells with the whorls dis- 

 which pulls the lower jaw downwards and pose ,i vertical!}- or in the same plane as a disc, 

 backwards. DISINFECTANTS, substances which destroy 



DIGKNESIS, that form of generation, cha- contagious influences. They must be more 

 racteristic of certain Entozoa, in which two tnan mere deodorisers, which frequently 

 forms are alternately produced ; the parent only conceal the mephitic influences with- 

 never being like the offspring, but the third O ut destroying them. The deodorisers men- 

 generation reproducing the form of the first, tioned specifically under that head (ante) 

 and the fourth of the second. The term has are all of them disinfectants as well and to 

 also been applied to reproduction by two pa- the list may be added Chloride of Soda 

 rents, each engaged in the act of generation, (common salt) in solution, and Hypochlorite 



DIGITALIA, a poisonous alkaloid obtained O f Soda, Labarraque's Disinfectant, and also 

 from the leaves of Digitalis. Chlorozone. 



DILUENTS, liquids which dilute the secre- DISPENSATORY, a synonym of Phanna- 

 tions, and promote perspiration and the copooia. 

 secretion of urine. DISTICHIASIS, or Trichiasis, a malforma- 



DiMiDiATE, a botanical term applied to tion consisting .'a double row ot eyelashes; 

 782 3 B 



