IGNATIUS 



2918 



IGUANA 



IGNATIUS, igna'shius, SAINT, bishop of 

 Antioch, one cf the 'early Christian martyrs. 

 He is credited with the authorship of seven 

 Greek epistles bearing his name, which are 

 included among the works of the apostolic 

 fathers. These give evidence of his earnest, 

 devoted spirit and intense religious enthu- 

 siasm. Ignatius is supposed to have been born 

 in Syria, about the middle of the first century, 

 and to have been a disciple of the apostle 

 Saint John. About A. D. 107, at the command 

 of Emperor Trajan, he was thrown to the wild 

 fceasts in the arena at Rome. 



IGNATIUS OF LOYOLA. See LOYOLA, IGNA- 

 TIUS OF. 



IGNEOUS, ig'neus, ROCKS. Granite, 

 quartz and various other rocks are masses of 

 crystals, cemented together by some other 

 substance. We know that when we melt sugar 

 or dissolve alum in hot water and allow the 

 mixture to cool, it forms crystals. From this 

 knowledge we are safe in forming the conclu- 

 sion that the rocks named above were once 

 in a molten state and that when they cooled 

 they formed the crystals we now see in them. 

 Because these rocks were formed by the action 

 of heat, they are called igneous rocks, for 

 igneous means fire, or burning. See GEOLOGY. 



IGNIS FATUUS, ig'nis fat'uus, a Latin 

 term meaning joolish fire. It is applied to a 

 singular luminous appearance resembling a pale 

 flame, sometimes seen hovering over marshy 

 places and, also, according to somewhat doubt- 

 ful tradition, in churchyards at night. It is 

 called will-o'-the-wisp, spunkie, Jack-o'-lantern 

 and other names in the different sections in 

 which it is said to occur. There has always 

 been some doubt as to its actual existence, 

 and many scientists have investigated the phe- 

 nomenon. They have never arrived at satisfac- 

 tory conclusions, but those who firmly believe 

 in its existence account for it as the result of 

 spontaneous combustion of gases. 



IGORROTE, egohrro'tay, or egohrroht' , a 

 tribe inhabiting certain portions of the island 

 of Luzon, Philippine Islands. The name means 

 mountain people, and was at one time indefi- 

 nitely applied to the inhabitants of mountain- 

 ous parts of several of the islands in the 

 Philippine group. The Igorrotes were by 

 nature through generations of training a war- 

 like race and were head-hunters until they were 

 subdued by United States troops and turned 

 to the arts of peace. Hundreds of them are 

 now soldiers engaged in guard duty over tribes 

 whose heads they once sought as trophies of 



war. They are skilful agriculturists and 

 quickly learned to adopt many -of the ways 

 of the "white brothers." Some of their houses 

 have two stories, the lower being used as work- 



PAST AND PRESENT 



The first picture is that of an Igrorrote boy in 

 1906 ; all of his tribe were of his stage of civiliza- 

 tion. The second picture is of the same boy, nine 

 years later. 



shop and living room, the upper serving as a 

 storeroom and kitchen. The number of the 

 tribe is estimated at 211,500. L.F. 



IGUANA, ig-wah'nah, a genus of lizards 

 containing a great number of slightly differ- 

 ing species, common in South America, but 

 found also in the southwestern part of the 

 United States, Mexico and Central America. 



IGUANA 



A West Indian species, closely related to those 

 in Southwestern United States. 



The iguana is a timid, defenseless animal, 

 though it is decidedly formidable in appear- 

 ance. Along its back to the tip of the tail 

 runs a row of spiny, pointed scales; the toes 

 are armed with strong, sharp claws, with which 

 it readily climbs trees. The color is usually 

 olive green, mixed with shades of brown. Some 

 species have the power of changing their col- 



