The Lealt Valley Diatomite Railway was a

narrow gauge A narrow-gauge railway (narrow-gauge railroad in the US) is a railway with a track gauge narrower than standard . Most narrow-gauge railways are between and . Since narrow-gauge railways are usually built with tighter curves, smaller structu ...

tramway on the

Isle of Skye The Isle of Skye, or simply Skye (; gd, An t-Eilean Sgitheanach or ; sco, Isle o Skye), is the largest and northernmost of the major islands in the Inner Hebrides of Scotland. The island's peninsulas radiate from a mountainous hub dominated ...

Scotland Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to the ...

, which ran parallel with the River Lealt. Work was underway to lay the tramway in March 1889. At the opening, the line was worked by gravity – the line being on a falling

gradient In vector calculus, the gradient of a scalar-valued differentiable function of several variables is the vector field (or vector-valued function) \nabla f whose value at a point p is the "direction and rate of fastest increase". If the gradi ...

– and manpower. Later, the line began the use of a steam locomotive. The western end of the line was at Loch Cuithir, where

diatomite Diatomaceous earth (), diatomite (), or kieselgur/kieselguhr is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder. It has a particle size ranging from more than 3 μm to le ...

- known locally as ''Cailc'' (

Scottish Gaelic Scottish Gaelic ( gd, Gàidhlig ), also known as Scots Gaelic and Gaelic, is a Goidelic language (in the Celtic branch of the Indo-European language family) native to the Gaels of Scotland. As a Goidelic language, Scottish Gaelic, as well as ...

for

chalk Chalk is a soft, white, porous, sedimentary carbonate rock. It is a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of microscopic plankton that had settled to the sea floor. Chalk ...

) - was taken out from the lochbed and dried on wire nets. The seaward terminus had warehouses on the cliff-top at Invertote. At the base of the cliff was a factory where the diatomite was kiln dried, ground and

calcined Calcination refers to thermal treatment of a solid chemical compound (e.g. mixed carbonate ores) whereby the compound is raised to high temperature without melting under restricted supply of ambient oxygen (i.e. gaseous O2 fraction of air), genera ...

. The line was extended from the factory onto a pier into the

Sound of Raasay The Sound of Raasay ( gd, Linne Ratharsair) is the sound between the islands of Raasay and Skye. See also * Inner Sound, Scotland * Isle of Skye * Loch Kishorn * Mealt Waterfall * Quiraing References External links and references One ...

. Diatomite was also gotten from Loch Valerain and transported by

aerial ropeway A material ropeway, ropeway conveyor (or aerial tramway in the US) is a subtype of gondola lift, from which containers for goods rather than passenger cars are suspended. Description Material ropeways are typically found around large mining conc ...

to Staffin Bay. During its existence, the Skye Diatomite Company extracted 2000 tons of diatomite. From Invertote, the

was transferred by

skiff A skiff is any of a variety of essentially unrelated styles of small boats. Traditionally, these are coastal craft or river craft used for leisure, as a utility craft, and for fishing, and have a one-person or small crew. Sailing skiffs have devel ...

, onto puffer boats, waiting in the bay, and shipped across to the mainland. The diatomite was turned into

kieselguhr Diatomaceous earth (), diatomite (), or kieselgur/kieselguhr is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder. It has a particle size ranging from more than 3 μm to le ...

which was mixed with

nitroglycerine Nitroglycerin (NG), (alternative spelling of nitroglycerine) also known as trinitroglycerin (TNG), nitro, glyceryl trinitrate (GTN), or 1,2,3-trinitroxypropane, is a dense, colorless, oily, explosive liquid most commonly produced by nitrating ...

by Nobel Industries, at Ardeer, to make

dynamite Dynamite is an explosive made of nitroglycerin, sorbents (such as powdered shells or clay), and Stabilizer (chemistry), stabilizers. It was invented by the Swedish people, Swedish chemist and engineer Alfred Nobel in Geesthacht, Northern Germa ...

References

Pre-grouping British railway companies Closed railway lines in Scotland Railways on Scottish Islands 2 ft gauge railways in Scotland Isle of Skye Railway lines opened in 1890 Transport in Highland (council area) 1890 establishments in Scotland 1915 disestablishments in Scotland British companies established in 1890 British companies disestablished in 1915 {{Scotland-rail-transport-stub