. Guide leaflet. clear nights faintmoving sparks of light may be seen toemanate sporadically from the starrycanopy and increase in brightness as theymove rapidly towards the earth, butseldom reach it before quickly andsilently disappearing. Such objects arecalled ^shooting stars or small , a brilliant streak of lightwith a more or less well-defined headcalled a fireball or bolide, accom-panied by a hissing sound and detona-tions, will light the sky momentarily andstrike the earth at a place near or beyondthe range of vision of the are also meteors, but of a l
. Guide leaflet. clear nights faintmoving sparks of light may be seen toemanate sporadically from the starrycanopy and increase in brightness as theymove rapidly towards the earth, butseldom reach it before quickly andsilently disappearing. Such objects arecalled ^shooting stars or small , a brilliant streak of lightwith a more or less well-defined headcalled a fireball or bolide, accom-panied by a hissing sound and detona-tions, will light the sky momentarily andstrike the earth at a place near or beyondthe range of vision of the are also meteors, but of a largersize than the shootingstar type. Perhaps acloud of dust will be seento rise from the placewhere it struck and itslodgment can be definite-ly located. When thespot is approached, theremay be seen a newly madehole, one or more feet in A PORTION OF THE ROSE CITY, MICHIGAN, METEORITE Composed of a network of stone and metallic masses with a black crust appearing on the upper and lower margins 10 NATURAL HISTORY. (Left) The Homestead, Iowa, Shower.—Showing a characteristic eUipsoidal area, 3X6 mil(Pieces weighing 32 kilograms were found along the northern margin. (Right) The HolbrooArizona, Shower.—The ellipsoidal area is 1 X3 miles in extent. Many thousands of small fragmen have been recovered depth with an object in the bottom of object may be either a stone with ablackened surface or an irregular massof metal marked on the front or brust-seite with shallow furrows and subconicalpits, and on the rear side with depres-sions called thumb-marks or piezo-glyphs. Sometimes the thumb-marks arefound on all surfaces. These markingsare due to superficial heating produced byfriction with the air. Whether the objecthas a stony or metallic aspect its appear-ance will be unlike any terrestrial rock orstone and may be called a meteorite. Stony meteorites often fall as showersdue to the fact that the original massexplodes or bursts one or more timesbefore reaching the earth. The
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901
