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

Triassic Conifer Fossil – Nymboida New South Wales

A nice example of a longitudinal foliar stem section – Coniferales [Risskia Media – Tenison Woods, 1883].

From the middle Triassic period [circa 1225 million year] which represented the period of the “greening” of the planet and the land that is generally referred to as Gondwana.

This sample was found in the Basin Creek Formation of the Nymboida coal measures. They can be accessed from Coffs Harbour – about 50 kms north-west.

Size 12cm weighing circa 200 gm.

Nice fossil from the greening of Gondwana

$40.00

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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

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.
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$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

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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The Geology of the Broken Hill District – E.C. Andrews – 1922 – along with the Supplement of 1923.

Memoir No 8 of The Geological Survey of New South Wales – probably the most important and certainly the most comprehensive / voluminous.

Large thick quarto (25cn x 32cm) xx, 432 pages, 124 plates, numerous maps, plans and diagrams.

Light ageing to the original heavy boards, very clean inside a super copy of a now scarce item, rarely together with the Supplementary item, quarto, same dimensions, 28 pages and nine excellent coloured plates of mineral specimens.

The principal work produced by William Gullick, Government Printer, Sydney – the Supplement by Alfred Kent also appointed Government Printer – maybe a specialist in the colour plates.

A heavy item and an Overseas postage supplement may be required – please enquire we can be helpful.

Ernest Clayton Andres (1870-1948) another legend from the “golden era” of Australian geology – disciple of Edgeworth David. Had a tough upbringing but still managed to get to Sydney University to study mathematics. It was there he met Edgeworth David. Taught but continued to study chemistry and geology. Presented his first geological paper in 1898 on the Bathurst region. Did much work on coral reefs [using Agassiz material]. This work and the later Mineral Industry of New South Wales [1928] are considered epics. Highly praised and prized – Lyell Medal London Royal Geological Society. His entry in the official Australian Dictionary of Biography well worth the read.

Important substantial geological work together with its supplement.

$790.00

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Antique Drum Microscope [Steward’s Portable Botanical Compound Microscope] c1870’s

A very nice cased English drum or field microscope. We have identified this exact type including accessories in the J.H. Steward Catalogue for 1871 so we can date it pretty well – see image of catalogue page with full description.

Original mahogany case with internal compartments circa 21cm x 8cm x 7cm. It has a crack in the lid of no structural consequence. Overall, a lovely patina superior to the usual pine equivalents.

Microscope in good condition with original eyepiece, three numbered objectives – instructions claim to give maximum magnification of 10,000 times.

Also provided is a brass box with a glass bottom usually for aquatic objects also crystals, salts etc. An insect box for small live insects. Five [would have been six] named paper covered prepared slides original to the set.

Extra special, almost unheard of, we still have the original “printed directions” with schematic of the microscope and accessories. Put back together by someone else with Sellotape

A super example of this upmarket drum style brass microscope.

Steward’s Catalogue goes on … “For Utility, Portability, and Cheapness, this Instrument is not equalled; and to convey some idea of its power, a Microscopic Photograph of the “Trial of Pickwick”, containing upwards 9,000 letters, and occupying the space of a pin’s head, when placed under this Instrument every word can be rad with the greatest ease”

1870’s Quality identified drum microscope with original accessories and printed directions.

$360.00

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Triassic Conifer Fossil – Nymboida New South Wales

Botryoidal Goethite – Yaraka Queensland

French Miniature Furnace Microscope – c1850-60

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

The Geology of the Broken Hill District – E.C. Andrews – 1922 – along with the Supplement of 1923.

Antique Drum Microscope [Steward’s Portable Botanical Compound Microscope] c1870’s

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