[7]Quite recently, a fourth division, the _tektites_ (discussed in the next chapter), has been recognized by some authorities. [8]Discussed in Chapter 12. [9]The Acts of the Apostles, 19:35. [10]Also _baetyl_ and _baetulus_, from the Greek word _baitylos_, a term used for sacred meteorites and stones. [11]This metallic mass was the first stony-iron meteorite to be identified as such. The _pallasites_, which make up an important subdivision of the stony-iron meteorites, were named in honor of Pallas. [12]Very recently, some authorities have concluded that there must have been not one but several meteorite-planets. Space Nomads Meteorites in Sky, Field, and Laboratory By Lincoln LaPaz and Jean LaPaz Meteorites are the real tokens of space! They are samples of cosmic matter we can actually take in our hands. Science values them greatly as specimens of _the only tangible_ substances we have from remote and inaccessible regions of the universe. These mysterious “space nomads” are revealing to today’s scientists many amazing and usable facts about conditions in outer space, about the age of our Solar System, and even about the probable constitution of our own home planet. This is an essential book for everybody who is keeping up with space science and wishes to be well posted on these interesting but potentially dangerous co-voyagers that the astronauts may encounter. You will also see in SPACE NOMADS: The awesome event a meteorite-fall can be, with its violent sound and light effects, and its terrific impact. The excitement and the know-how of the hunt for these cosmic missiles. How to tell the difference between a true meteorite and a mistaken one. Ditto, meteorite craters. How to make your own contribution to science by knowing the right way to observe and report meteors and meteorites. What is inside them, and how they vary in content and structure. The moon as a meteorite target. The strange history of the subject—the amusing superstitions and fantastic notions believed until recently about “shooting stars” and “stones falling from the sky.” And more. Here is an easy but sound introduction to the rapidly developing science of meteoritics. All of the information is up-to-date, much of it firsthand, for the authors are themselves professional meteoriticists. Daily they are engaged in fieldwork, laboratory analysis, and advanced research at one of the world’s chief centers for this study. (See back of jacket.) A HOLIDAY HOUSE BOOK 12 UP $3.95 _Jacket by Leo Manso_ [Illustration: HARVEY CAPLIN PHOTO Lincoln LaPaz]