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From: PEKKOLA J MARKO (JMPEKKOLA_at_hidden_email_address.net)
Date: 12/01/1995



METEOPTIC NEWS GROUP MESSAGE There is three things in this long message.

A/. The reference to Fraser s book review on Meinel s, that I promised to send a few days ago. Which is this: Fraser A.B. / Applied Optics:
"Sunsets,

Twilights and Evening Skies". Review. Vol. 23 (1984), no 10, p. 1670.

B/. A list of THE DOZEN major halo books and comments of them.

C/. In the very end I ask e-mail addresses of a few atmospheric optics authors
in USA and in GB for the case anybody of you folks knows the answers.

DOZEN GREATEST HALO BOOKS of the last 150 years

 The following list of central halo books is not intended as FAQ. I send this for
the case some of you want to have a general view of the historically most  important dozen halo sources published through the last 150 years. Seperate
 books from one, same author have been united under one treatment; so exactly
12 authors are discussed.

  1. Bravais A. / "Memoire sur les halos et les phenom`nes optiques qui les accompagnent." Journ. de l'Ec. Polyt. XVIII, 31. cah. (1847). In French.

This is the earliest book that really went inside the halo world. Nowadays the whole thing is mostly only of historical value, yet in the historical row it is surprisingly central. Discusses many halo forms, several of them being quite crazy missunderstandings.

2. Hastings C.S. / "Light." Charles Scribner s Sons, New York (1902). And also: Hastings C.S. / MWR: "A general theory of halos." Vol 48 (1920), pp 322-330. The latter not being a book, but major source.

Occasionally wonderfully written stuff, especially the eloquent attack on Hevel s halo in "Light". Mostly outdated, but of historical interest. The
selection of halos discussed is cautiously narrow.

3. Pernter J.M. and Exner F.M. / "Meteorologische Optik." 2nd ed. Wilhelm Braum~ller, Vienna and Leipzig (1922). In German.

A meteorological optics classic. If we would have a science citation index available throughout the last 150 years, this book would probably still win the competition of most citations among all atmospheric  optics publications. It enjoyed several decades of no 1 position as a general met. optics source. Nowadays largely, almost completely outdated. Yet a must-be-in-your-shelf book if the person is interested to write historical data on halos, green flashes, coronas,  rainbows etc.

4. Wegener A. / Aus d. Arch. Seewarte (Deutsche Seewarte, Hamburg): "Theorie der Haupthalos." Vol 43 (1925), No 2. Pp 32. In German.

Again more of a major publication than a book. When discussing the anthelic arcs as well as when arguing about the continental  drift Wegener was more right than his opponents. Selection of halos discussed quite narrow. Historically and mathematically interesting.

5. Meyer R. / "Die Haloerscheinungen." Probleme der Kosmischen Physik,  no XII. Hamburg, Henri Grand (1929). 8 . Pp viii+168. And see also: Meyer R. / "Haloerscheinungen." (1925) Theor. Beitr. met. Opt. Abh. Herder-Instituts zu Riga. Vol 1, no 5. In German.

Meyer fooled a row of scholars by making two different halo books under exactly the same German title - he really ran out of imagination. Much of the stuff in Meyer is outdated. Also considerable portions are  repeated more or less from Pernter & Exner. Relatively large selection of halo forms discussed.

6. Humphreys W.J. / "Physics of the Air." 3rd Ed. MacGraw, New York (1940).

I actively dislike the halo treatment in this source. Its far too well quoted partly just because it just happened to appear as a first big halo
source in English language within a long time interval. For example the most rare halos are covered lousily, some of the theoretical
presentations have been later proven quite crazy. The handling of observational
 side of theoretical effects is consistently neglected. He just presents from ad hoc chosen pyramidal crystals a few effects that havent been shown to exist in nature - not at his time, neither in ours.

7. Minnaert M. / "The nature of light and color in the open air." Translated from Dutch original . Dover, New York (1954).

Wonderfully written. Central in atmospheric optics, but the guy is no halo expert. The lists of rare halos present pure chaos. There is another Dutch scholar who made much better... but who s single missfortune was to write only in Dutch and in German...

...8. Visser S.W. / "Optische verschijnselen aan de hemel." Kon. Ned. Met. Inst. Verspreide Opstellen 3. Staatsdrukkerij, `s-Gravenhage (1957). See also: Visser S.W. /
"Die Haloerscheinungen." Handbuch der Geophysik, Band 8, Verlag
Borntr{eger Berlin, pp. 1027-1077. (1961). The latter much more detailed on halos. A major author.

 Two books by Visser are somewhat vastly outdated - regarding the views  on rare halos especially, but this man had courage and enthusiasm to write
 on all sorts of halo forms. He is still the uncrowned king of the scientific
 halo publications with more than 70 papers on halos. Most of them presenting outdated stuff, but I sympatize this unfortunate old beard very much.

9. Liljequist G.H. / Norwegian-British-Swedish Antarctic Expedition,  1949-52. Scientific Results, Vol II. Pt. 2. Special studies. A.
"Halo-phenomena and ice-crystals." Oslo, Norsk Polarinst.(1956).

The biggest among the observational halo report books (there are many more). Like Weickmann (1948) who is not included here, Liljequist was the pioneer on simultaneous ice crystal sampling and halo observing. I met and interviewed him together with Marko Riikonen one year ago in December 1994 at his home in Uppsala, Sweden. He was 80 years old and jumping of enthusiasm on all kinds of things. One of the most sympatical scientists I have ever met. He died soon after our visit. The work is mainly of historical interest, but partly still interesting stuff because the well made observations and the ice crystal samples.

  1. Tricker R.A.R. / "Ice crystal haloes." Optical Society of America, Washington D.C. (1979). See also: Tricker R.A.R. / "Introduction to meteorological optics." American Elsevier, New York (1970).

The first one of the two is not very well known. Both are visually desappointments and the scientific material is not very good either. Also the halo lists are quite short if compared to Pernter-Exner or Visser. Still a relatively big non-antique source on halos.

  1. Greenler R.G. / "Rainbows, halos and glories." New York (1980).

Exceptionally great book on atmospheric optics generally. Wonderfully written.
Visually the first good source (the first truely international color photographs compilation of common and rare halos). Surprisingly much of the rare halo stuff is nowadays outdated. The used simulation method is nowadays outdated; gives unreliable intensity distributions etc. At few points ignores old literature too much. This work made a revolutionary impact on the field due to lot of things, i.e. by making the
computer simulations well known (the author started them together  with his American co-authors in 1970 s). Recommended by a host of people as a must in FAQ list and no wonder - it is a modern classic.

  1. Tape W. / "Atmospheric halos." Antarctic Research Series vol 64. American Geophysical Union, Washington D.C. (1994).

The greatest halo book ever. Get this into your shelf. The list of halos discussed is large, almost complete. Antarctican, Alaskan etc halo photographs are mostly stunning. The computer simulations, photographs and simultaneous ice crystal samples along with the thorough appendixes on scientific issues make it an unmatched discussion on halos. The critical
view of the Lowitz arcs (and effects associated with them) is outdated,  but predominantly due to displays that appeared after the book went into printing.

INQUIRY And the last issue. A challenge for you folks; Does anybody know e-mail  addressess of following authors; If you have answers, please address it just to: marko.pekkola_at_helsinki.fi.

  1. Richard O. Norton (Oregon, USA), 2. Fred Schaaf (Millville, New Jersey USA), 3. Stanley David Gedzelman (New York, USA) and 4. R.S. Scorer ( London, Great Britain).

Best Regards, Marko