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GLOSSARY. 



Photogenic (Gr. 0o>y, phos, light ; 

 yevvaw, genna'o, I produce). Pro- 

 ducing light ; produced by light. 



Pho'tograph (Gr. <ptas, phos, light ; 

 7/>ct(/>&>, graph'o, I write). A re- 

 presentation of an object, produced 

 by the action of light. 



Photog'raphy (Gr. <p(os, phos, light ; 

 ypa(j)<i>, graph's, I write). The pro- 

 cess of producing representations 

 of objects by the action of light on 

 a surface coated with a preparation 

 capable of being acted on by certain 

 rays of the sun. 



Photol'ogy (Gr. (peas, phos, light ; 

 \oyos, log'os, a discourse). The 

 science which describes light. 



Photomag'netism (Gr. $ws, phos, 

 light ; mag'netism). The branch 

 of science which describes the rela- 

 tion of the phenomena of magnetism 

 to those of light. 



Photom'eter (Gr. (pus, phos, light ; 

 perpov, met'ron, a measure). An 

 instrument for measuring the in- 

 tensity of light. 



Photom'etry (Gr. $005, phos, light ; 

 fj.fr pov, metfron, a measure). The 

 art of measuring the intensity of 

 light by observation. 



Photopho'bia (Gr. (pus, phos, light ; 

 (pofios, phob'os, fear). Dread of 

 light. 



Phragma (Gr. <ppa<ro~ca, phrasso, I 

 divide). A transverse division or 

 false dissepiment in fruits. 



Phrag'mocone (Gr. (ppao-crca, phrasso, 

 I divide ; KUVOS, konos, a cone). 

 The chambered cone of the shell of 

 the belemnite cephalopods. 



Phrenic (Gr. (ppnv, phren, the 

 diaphragm). Of or belonging to 

 the diaphragm. 



Phreni'tis (Gr. (ppriv, phren, the 

 mind ; itis, denoting inflammation). 

 Inflammation of the brain. 



Phrenology (Gr. <j>pr)v, phren, the 

 mind ; \oyos, log'os, discourse). 

 Literally, the science of the human 

 mind ; but applied especially to a 

 doctrine of mental philosophy, 

 founded on a presumed knowledge 

 of the functions of different parts 

 of the brain, obtained by compar- 

 ing their apparent relative forms 



and magnitudes in different indivi- 

 duals with the mental propensities 

 and powers which these individuals 

 are found to possess. 



Phthi'sic or Phthisical (Gr. tyQua, 

 phthio, I consume). Belonging to 

 or affected with phthisis or tuber- 

 cular disease. 



Phthi'sis (Gr. <pOua, phthio, I con- 

 sume). The disease commonly 

 known as consumption, connected 

 with a morbid deposit in the lungs, 

 called tubercle. 



Phycol'ogy (Gr. <puitos, phu'kos, sea- 

 weed ; \oyos, lag'os, discourse). 

 The study of algae or sea-weeds. 



Phyllo'dium (Gr. <pv\\ov, phidlon, a 

 leaf ; eiSos, eidos, form). A leaf- 

 stalk enlarged so as to resemble a 

 leaf. 



Phyll'ogen (Gr. <pv\\ov, phutton, a 

 leaf; yevvaca, genna'd, I produce). 

 The terminal bud from which the 

 leaves of palms grow. 



Phyll'oid (Gr. <pv\\ov, phutton, a 

 leaf ; clSos, eidos, form). Like a 

 .leaf. 



Phylloplas'tic (Gr. <pv\\ot>, phullon, 

 a leaf ; irKaaata, plas'so, I form). 

 Forming leaves. 



Phyllopto'sis (Gr. <pv\\ov, phullon, 

 a leaf ; Trroxny, ptosis, a falling). 

 The fall of the leaf. 



Phyllotax'is (Gr. cpv\\ov, phullon, a 

 leaf; Ta<ro-w, tasso, I arrange). 

 The arrangement of leaves on the 

 axis or stem. 



Physical (Gr (pwis, phu'sis, nature). 

 Belonging to natural or material 

 things, as opposed to moral or 

 imaginary ; applied also to those 

 properties of bodies which ai'e 

 directly perceptible to the senses, 

 in opposition to those which are 

 known as chemical or vital. 



Phys'ico-Mathematics. The branch 

 of mathematical science which in- 

 vestigates the laws and actions of 

 bodies and their combinations, by 

 means of data drawn from obser- 

 vation and experiment. 



Phys'ics (Gr. <pvo-is, phvfsit, nature). 

 In its literal sense, the science of 

 nature and natural objects, imply- 

 ing the study or knowledge of every- 



