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Voyager Rare Books Maps & Prints » Products » Non-fiction » Science including Natural Sciences, Chemistry, Physics, Mathematics, Astronomy, Medical Sciences etc

Science including Natural Sciences, Chemistry, Physics, Mathematics, Astronomy, Medical Sciences etc

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  • Direct Vision Spectroscope [Produces Super Clear Spectra] – c1890-1910

    Direct Vision Spectroscope [Produces Super Clear Spectra] – c1890-1910

    A fine example of a direct vision spectroscope no makers mark but likely manufactured by John Browning of London. Browning was the top London maker of spectroscopes in the late 19th early 20th Century and, was the leader in spectroscope development.

    Victorian or Edwardian in manufacture. Works very well and produces sublime spectra. Contains a train of five alternating crown and flint glass prisms in order to correct for chromatic aberration. Brass body unmarked and with a complete covering of the original gold lacquer. Plush lined case has some rubbing; the clasp still holds firm.

    This design is also known as the “Rainband” spectroscope and was used by gentlemen scientists to detect the spectral bands that appear as water vapour builds prior to a shower of rain. This is the more sophisticated version with a knurled device for altering the slit width and a draw tube for fine focus. cap to protect the slit from dust is original and fits snugly.

    Very good condition working spectroscope

    $190.00

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  • Australian Opal in Coal Matrix – Antique Microscope Slide – W Hemingway – Derby England – c1910

    Australian Opal in Coal Matrix – Antique Microscope Slide – W Hemingway – Derby England – c1910

    W Hemingway was among a group of thin section microscope slide preparers who specialised in Coal measure inclusions in the North of England at the turn of the 19thC.

    This slide is an unusual one for W Hemingway given the Australian subject. And an unusual slide as one could expect the occurrence of opal within coal measures is quite rare and only likely to arise where coal formations are close to if not adjacent to opal fields. There is a hint of coal at Arckaringa north of Coober Pedy … we are not sure where else … so would be interested to hear from anyone with a clue.

    Slide is nicely prepared as would be expected of Hemingway [Preparer included in primary reference Bracegirdle – example Plate 21].

    Rare slide of a rare occurrence opal in coal – circa 100+years.

    $80.00

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  • Huxley – Evolution’s High Priest – Adrian Desmond.

    Huxley – Evolution’s High Priest – Adrian Desmond.

    Author Adrian Desmond a distinguished scientist, University College London and the font of knowledge on the history of the forming and influence of the evolutionary theory. Written several books on the subject and its main promoters …. Darwin, Huxley et al. This monument about Huxley’s later years … and exhaustive biography drawn on, but not only on, five thousand manuscript letters [seems a lot].

    Published by Michael Joseph, London in 1997. Thick octavo, 370 pages, illustrated – some great period images – a very good copy.

    Thomas H Huxley – more that someone’s bulldog …

    PS – Does anyone agree that Michael Palin would make a good Huxley?

    $35.00

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  • Botryoidal Goethite – Yaraka Queensland

    Botryoidal Goethite – Yaraka Queensland

    The mineral Goethite or iron oxy-hydroxide here in a nice botryoidal (resembling grapes) crystal form.

    Found in the Yaraka Boulder Opal Field 100km east of Blackhall, Queensland. Last count remote Yaraka had an official population of 20 – they all get along.

    Small fist sized weighing 350 gm.

    Good lustre to the botryoidal form

    $50.00

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  • French Miniature Furnace Microscope – c1850-60

    French Miniature Furnace Microscope – c1850-60

    Scarce miniature Mineral or Furnace Microscope attributed to Bertrand, Paris in the Billings Collection pages 37 and 193. The Billings example no 369 on page 193 is identical even down to the circle made on the outer case from running the closing catch around.

    Beautifully made, the original mahogany box has a conical dove tail slide cut into its top into which the instrument sits. The brass base screws to the tune stand. There is a square cut in the front that houses a single mirror on a milled head pivot. The stand is cut away for the fixed circular stage. At the top of the stand there is a screw in cylinder into which the body tube slides. There is an outer casing which slides downward to become a slide holder. The objective and ocular screw in.

    This is a collector’s item – it is probably one of the smallest practical microscopes ever made, is extremely well made and in as perfect a condition one could expect for its age. The case is undamaged with a great patina.

    Case dimensions approximately 85mm x 45mm x 35mm. Microscope height 75mm base diameter 25mm.

    Perfect collectable miniature microscope – over 150 years old.
    .

    $260.00

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  • Original PhD Thesis – The Force-Field Approach to Neutron Monitor Observations of the Eleven-Year Cosmic-Ray Modulation Cycle – H. Morall

    Original PhD Thesis – The Force-Field Approach to Neutron Monitor Observations of the Eleven-Year Cosmic-Ray Modulation Cycle – H. Morall

    Harm Moraal [1947-2015] born in the Netherlands but spent most of his life in his adopted home South Africa where he was Professor of Physics at Potchefstroom University. He became an accepted world authority in Cosmic Rays and a member of the Commission on Cosmic Rays of the International Union of Pure and Applied Physics – now the Commission on Astro-particle Physics – in the 1990’s he was Chair of the Commission. He was involved in numerous other related bodies.

    Harm Moraal completed this PhD in December 1973. The work comprises 130 pages reproduced from typescript bound in faux black Morocco, gilt titles to front hand done consistent with the techniques of the period.

    This is high level science and of history of science merit. Chapter subjects include :–

    Cosmic-Ray Modulation Theory [Development of Equations; Mono-Energetic Solutions; Force-Filed Solutions etc]

    The Force-Field Equation Applied to Neutron Monitor Response Functions [Force-Field Equations for a Mixture of Particle; Neutron Monitor Distribution Functions (the Experiments); Validity of the modified convection diffusion approximation etc]

    The Force-Field Equation Applied to Measurements of Stationary Neutron Monitors [Fractions Counting Rates etc]

    The Modulation of Cosmic-Ray Electrons [Comparison with neutron monitor results and separability of the diffusion coefficient etc]

    Various Appendices including – the Rigidity Dependence of the Diffusion Coefficient near the Cosmic-Ray Maximum of May 1965.

    Important PhD Thesis by a man who then devoted his life to his subject Cosmic-ray Physicist Harm Moraal .

    $140.00

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