546 GLOSSARY. 



Digitate, divided like the fingers. 



Dip, the inclination of a stratum of rock from the horizon. 



Dyke, a mass of rock which appears to have been injected into 



the fissures of other rocks. 

 Drift, masses of sand or other matters driven together by 



water. 



Deleterious, injurious, noxious. 



Duramen, the inside, brown heart of wood of forest trees. 

 Decompose, to separate into parts or elements. 

 Data, known or admitted facts or principles. 

 Deutoxide, a chemical compound containing two proportions of 



oxygen. 



Daguerreotype, a process of taking pictures by means of light. 

 Dynamical, pertaining to strength or power. 

 Deliquiesce, to dissolve gradually by attracting and absorbing 



moisture from the air. 

 Distillation, separating essential oils or alcohol from other 



matters, by means of heat, 

 Diurnal, daily, occurring daily. 



Disinfecting, purifying and preventing contagion or infection. 

 Extant, now in use. 

 Extirpate, to destroy or eradicate. 

 Excavate, to dig or wear out a hollow or cavity, 

 Excrements, matters voided or excreted by animals. 

 Endogens, plants which grow from the inside. 

 Electricity, a principle in nature usually called lightning. 

 Elasticity, power of resuming form after compression. 

 Elective affinity, that affinity which causes an acid or alkali to 



abandon one with which it is already united, and unite with 



another. 

 Ether, a subtil matter which is much lighter than air, and 



supposed to exist beyond the limits of the atmosphere. 

 Emit, to send off, give out or discharge. 

 Expansion, the act of enlarging or increasing in bulk. 



