Surveying

Elliot Brothers – Strand London – Prismatic Compass – c1880

A working Victorian prismatic compass by the esteemed Elliot Brothers.

Constructed of blackened brass, 9.5cm in diameter, weight 160 gm. Engraved on the sighting arm “Elliot Bros. 449 Strand London”. Also, likely first owners name engraved on the rear “Herbert J Dauberry”. The sighting arm still contains its “horsehair” and lifts and stays in the vertical position. The hinged prism can be moved to its operating position over the base plate. With the compass held steady and flat a notch on the prism body is aligned with the horsehair on the arm. A compass reading can be taken through the magnified prism lens, the compass can be held in position via a locking pin under the arm. The compass rotates freely, and the lead glass is unusually free of scratches. Really quite a special object.

William Elliot founded his business at Gray’s Inn, London in 1800. He started by making fine drawing instruments. By 1807 he had moved to High Holborn and by 1816 was making telescope and barometers. In 1830 he moved to 56 The Strand and his sons joined the partnership. They began making surveying instruments particularly for the fast-developing railway industry. In 1853 Willam died, and the sons continued as Elliot Brothers. They moved to larger premises at 449 The Strand sometime around 1860 and were there until another move to St Martin’s Lane circa 1890 – so we can have a good stab at the date of manufacture.

The business continued to flourish and eventually became part of G.E.C. and then Siemens.

Quality Prismatic Compass – by Distinguished Elliot Bros.

$160.00

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Amsler Polar Planimeter [Measuring the area of complex irregular shapes/ boundaries] c1910

Plush-lined fitted case some 12” long contains a polar planimeter invented by Swiss mathematician Jacob Amsler. All in very good condition and working order.

The instrument was a revolutionary change from the complex Cartesian system base instruments used before. This device uses polar co-ordinates.

With this device two arms are connected with a pivot both arms moving around the anchor. As the pivot moves back and forth it traces an area whose net measurement is zero. The means that the area traced by the tracer point exactly equals the area of the closed curve. The area is equivalent to 2pi X the product of the length of the tracer arm, the radius of the counting wheel and the number of revolutions of the counting wheel.

In more modern times mathematicians apply “Green’s theorem”.

Amsler’s radical and very useful new design

$190.00

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Major Mitchell’s Map -1834 [Exploration and Surveying New South Wales] – Alan Andrews

A quality production by Blubber Press, Hobart published in 1992. Octavo, 402 pages, illustrated throughout, end paper maps. A fine copy as if new.

Mitchell and his team spent seven year surveying the often difficult terrain of New South Wales to produce of the greatest maps ever produced .. this is the magnificent story of that accomplishment

Mitchell’s Great Achievement

$50.00

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The Elements of Dowsing – Henry de France

Anyone interested in the extraordinary skill of dowsing, to discover water of valuable minerals, should read this efficient go to book by Le Vicomte Henry de France. This English edition translated by A.H. Bell and published by G Bell, London in 1967.

We learn that the author was a leading expert in the field who unfortunately packed his clogs before it was published.

Octavo, 84 pages with the occasional appropriate sketch or diagram. Ownership name marked out on free end paper … otherwise a fine copy in a very good dust jacket.

Set out in nine chapters we start with the “History of the Art of Dowsing” and then the instruments – the Pendulum and the Rod. This leads to the Technique and Dowsing for Water and Minerals and Metals – enough to get any budding geologist interested. More advanced applications and an introduction to Radiesthesia … in cooking, medical applications and agriculture (some serious money saving ideas for the farmer with time to study and experiment).

Ever since we saw Jimmy on Opal Hunters get his dowsing rod out we have been hooked.

Understand and learn the science of dowsing – better than any University degree.

$40.00

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The Arbouin Copper Mines at Cardross on the Chillagoe Mineral Field, North Queensland – Lionel Ball – 1918

Queensland Department of Mines publication no 261 by Lionel Ball B.E. published in Brisbane in 1918. At that time Ball was the Government Geologist. The mines also produced some gold and silver.

Seventy pages still in the original olive green paper wrapper. Illustrated with a map, diagrams and images from photographs taken by the author. Previous ownership name etc on title otherwise clean and bright.

William Hahn, in exploring the Tate to the Walsh river traversed the outskirts of the field in 1872. After that likewise Mulligan the explorer whilst marking a road from the Etheridge to Palmer Goldfields passed within sight of the Mountain Maid cupriferous outcrop. It was not until 1897 that the true resources of the area were more properly understood when Arbouin and Harkins came upon the outcrops known as the Klondyke. Logan Jack visited the resulting field a year later and was most impressed with the possibilities. Unfortunately costs were high in this region and whilst there were some successes the outbreak of WWI put paid to that as many of the men involved enlisted and few sadly returned.

The publication starts with the usual history of the region also addressing previous publications.

A comprehensive report on the geology of the area .. pre-Silurian schistose rocks; Amphibolites; Pegmatites; Permian Elvans etc.

Ore deposits … their origin, lode channels, formations and ore shoots.

Mineralogy and the distribution of elements and the occurrence of minerals … many in form.

A Register of Holdings; Mining operations; Treatment carried out in terms of ore dressing and some smelting.

The Queensland Chillagoe Mines – A scarce and curious one ..

$60.00

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Some Mines and Mineral Deposits at the Heads of the Brisbane, Burnett and Mary Rivers – Jackson 1901

Queensland Department of Mines Report to both Houses of Parliament published in Brisbane in 1901, first year of Federation. At that time Dunstan was Assistant Government Geologist. The Report is presented by William Rands, Government Geologist.

Foolscap, 19 pages plus 5 full page plates. Chipped and repaired to leading edge of front page, otherwise in good condition.

Covers silver-lead deposits at Monsildale; the Rising Star, North Star and Great Pyramid Prospects at Biarra; Gold found near Milford Rocks Head Station; Gympie Copper Mines at Gooroomjam Creek; Nanango Gold Field; Jimma and a Cobalt Deposit at the Black Snake District.

A few diagrams within the text and a good image from an early photograph of the entrance to the Cobalt prospect [Certainly one worth following up!]. The Plates include a god Geological sketch of the Monsildale Silver Deposit; a Plan of the Rising Star Workings; Section of Workings at Gympie Copper; the Jimna Prospecting Tunnel [looks dangerous] and the Secrets of the aforementioned Cobalt.

A rare one and focusing on some quite boutique mining prospects of the period in the South-East of Queensland.

$90.00

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Elliot Brothers – Strand London – Prismatic Compass – c1880

Amsler Polar Planimeter [Measuring the area of complex irregular shapes/ boundaries] c1910

Major Mitchell’s Map -1834 [Exploration and Surveying New South Wales] – Alan Andrews

The Elements of Dowsing – Henry de France

The Arbouin Copper Mines at Cardross on the Chillagoe Mineral Field, North Queensland – Lionel Ball – 1918

Some Mines and Mineral Deposits at the Heads of the Brisbane, Burnett and Mary Rivers – Jackson 1901

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