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Jason Clarke Antiques
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Victorian Cased Fortin Barometer by Louis Casella
For sale, a mid Victorian Fortin Barometer in Ebonised Case by Louis Casella of London.
An early British example of this design of scientific barometer which has changed very little since its invention in 1800 by the Frenchman, Nicolas Fortin.
Comprised of a tubular brass body hung from a brass ring at the tip and with a brass surround at the base into which the lower part of the cistern is stabilised and levelled by three screws. The main part of the cistern is fashioned from a glass tube held down by a collar and screws around the outside and which allows the mercury level to be visible to the observer. A small internal spike hanging from the ceiling of the cistern inside allows the contents to be adjusted and levelled ahead of measurement.
The glass tube rises up through the brass body onto which an enamel backed and engraved Fahrenheit thermometer with brass protective casing is provided at the front. Where the tube reaches the dial at the top, the centre of the tube is cut away on back and front in order that the level can be observed against the scale. The silvered scale itself is engraved for 27 to 32 inches of barometric pressure to the right hand side and the left is beautifuly engraved with the maker’s name, L. Casella, Maker to the Admiralty & Ordnance, London. The base section has the serial No: 722.
The centre of the scale also contains a Vernier for more precise reading and is operated by a knurled brass turn to the bottom right of the scale. The dial is surrounded by a protective glass sleeve which may be removed by unscrewing the domed finial to the tip of the instrument.
The barometer comes complete with its original protective glazed case with hinged door and working lock and key to the base. The internal back wall is provided with white plastic backing for the cistern and the dial to ensure that the levels can be properly assessed. Clearly meant for display, this unusual example has been ebonised and has also been provided with a small and well executed carved pediment to the top, giving it a little more decorative distinction than others.
The maker, Luigi Pasquale Casella was the son of a musician who came to The British Isles in the Early Nineteenth Century and the anglicised “Louis” was born in Edinburgh in 1812. His Father eventually rose to be a music tutor to George III’s daughters but by the 1830’s, his son had apprenticed to Cesar Tagliabue, a noted Italian scientific instrument maker who had been in London since the turn of the century.
Casella eventually married Tagliabue’s daughter in 1837 and shortly after formed the partnership of Tagliabue and Casella with his new father in law in 1838. Tagliabue was already known to have been exporting his products to South America and Europe and must have provided Casella with a perfect grounding in both instrument making and more importantly in the business of selling them.
It is somewhat strange that this partnership should ever had existed given that Cesar is known to have had three sons, John, Anthony & Angelo but presumably his focus was on providing his daughter and her husband an equally good opportunity in life. The numerous Tagliabue’s listed in trade directories of the period would suggest that the family remained close knit in any case and the son John also went on to form an early partnership with Joseph Zambra prior to the latter’s more famous partnership with Henry Negretti in 1850.
Cesar Tagliabue died in 1844 leaving the business to be solely managed by his son in law Louis Casella and the under his long stewardship became one of the most renowned scientific instrument making firms of the nineteenth century, providing products to the likes of Darwin and Livingstone. Cordial relations were almost certainly maintained with Negretti & Zambra over the years as Casella’s catalogue of the 1860’s shares numerous similarities with his competitor. Both were equally capable makers so it suggests that the parties were probably sharing manufacturing practises to create greater industry and both exhibited with great success at The Great Exhibition and the following Exhibition of 1862 where Casella was awarded a prize for his meteorological instruments.
By this point, his catalogues state that he was employed as an instrument maker to The Admiralty, The Board of Trade, Board of Ordnance, The War Department, The Royal Observatories at Kew and The Cape of Good Hope and numerous Governments and Universities.
Casella’s sons, Louis Marino and Charles Frederick both trained under their Father alongside other members of the Tagliabue family and also the latterly famous JJ Hicks who was perhaps the most promising of all of those that emanated from his workshop. He eventually died in 1897 whereafter Charles took over the sole ownership of the company.
Sadly, the younger son did not possess the same level of business acumen and skill as his Father and the business had become rather run down by 1905 but it was incorporated in 1910 and with the assistance of more adept management from Rowland Miall and Robert Abraham, manged to regain its momentum. The First and Second World Wars saw it engaged in numerous Governmental contracts but also saw the deaths of both of Casella’s sons, finally severing the link with the original family.
Casella is one of the few companies of this period that still remains in existence today, it continued to provide meteorological instruments throughout much of the Twentieth Century but the focus of the business has since diversified into environmental sampling and monitoring products.
An extraordinarily good early example with a very distinctive case and a nice early example of Louis Casella’s output.
Circa 1860
SellerJason Clarke Antiques
View all stock from
Jason Clarke Antiques
Private dealer
By appointment only
Newbury
Berkshire
Tel : 07815 046645
Non UK callers : +44 7815 046645
An early British example of this design of scientific barometer which has changed very little since its invention in 1800 by the Frenchman, Nicolas Fortin.
Comprised of a tubular brass body hung from a brass ring at the tip and with a brass surround at the base into which the lower part of the cistern is stabilised and levelled by three screws. The main part of the cistern is fashioned from a glass tube held down by a collar and screws around the outside and which allows the mercury level to be visible to the observer. A small internal spike hanging from the ceiling of the cistern inside allows the contents to be adjusted and levelled ahead of measurement.
The glass tube rises up through the brass body onto which an enamel backed and engraved Fahrenheit thermometer with brass protective casing is provided at the front. Where the tube reaches the dial at the top, the centre of the tube is cut away on back and front in order that the level can be observed against the scale. The silvered scale itself is engraved for 27 to 32 inches of barometric pressure to the right hand side and the left is beautifuly engraved with the maker’s name, L. Casella, Maker to the Admiralty & Ordnance, London. The base section has the serial No: 722.
The centre of the scale also contains a Vernier for more precise reading and is operated by a knurled brass turn to the bottom right of the scale. The dial is surrounded by a protective glass sleeve which may be removed by unscrewing the domed finial to the tip of the instrument.
The barometer comes complete with its original protective glazed case with hinged door and working lock and key to the base. The internal back wall is provided with white plastic backing for the cistern and the dial to ensure that the levels can be properly assessed. Clearly meant for display, this unusual example has been ebonised and has also been provided with a small and well executed carved pediment to the top, giving it a little more decorative distinction than others.
The maker, Luigi Pasquale Casella was the son of a musician who came to The British Isles in the Early Nineteenth Century and the anglicised “Louis” was born in Edinburgh in 1812. His Father eventually rose to be a music tutor to George III’s daughters but by the 1830’s, his son had apprenticed to Cesar Tagliabue, a noted Italian scientific instrument maker who had been in London since the turn of the century.
Casella eventually married Tagliabue’s daughter in 1837 and shortly after formed the partnership of Tagliabue and Casella with his new father in law in 1838. Tagliabue was already known to have been exporting his products to South America and Europe and must have provided Casella with a perfect grounding in both instrument making and more importantly in the business of selling them.
It is somewhat strange that this partnership should ever had existed given that Cesar is known to have had three sons, John, Anthony & Angelo but presumably his focus was on providing his daughter and her husband an equally good opportunity in life. The numerous Tagliabue’s listed in trade directories of the period would suggest that the family remained close knit in any case and the son John also went on to form an early partnership with Joseph Zambra prior to the latter’s more famous partnership with Henry Negretti in 1850.
Cesar Tagliabue died in 1844 leaving the business to be solely managed by his son in law Louis Casella and the under his long stewardship became one of the most renowned scientific instrument making firms of the nineteenth century, providing products to the likes of Darwin and Livingstone. Cordial relations were almost certainly maintained with Negretti & Zambra over the years as Casella’s catalogue of the 1860’s shares numerous similarities with his competitor. Both were equally capable makers so it suggests that the parties were probably sharing manufacturing practises to create greater industry and both exhibited with great success at The Great Exhibition and the following Exhibition of 1862 where Casella was awarded a prize for his meteorological instruments.
By this point, his catalogues state that he was employed as an instrument maker to The Admiralty, The Board of Trade, Board of Ordnance, The War Department, The Royal Observatories at Kew and The Cape of Good Hope and numerous Governments and Universities.
Casella’s sons, Louis Marino and Charles Frederick both trained under their Father alongside other members of the Tagliabue family and also the latterly famous JJ Hicks who was perhaps the most promising of all of those that emanated from his workshop. He eventually died in 1897 whereafter Charles took over the sole ownership of the company.
Sadly, the younger son did not possess the same level of business acumen and skill as his Father and the business had become rather run down by 1905 but it was incorporated in 1910 and with the assistance of more adept management from Rowland Miall and Robert Abraham, manged to regain its momentum. The First and Second World Wars saw it engaged in numerous Governmental contracts but also saw the deaths of both of Casella’s sons, finally severing the link with the original family.
Casella is one of the few companies of this period that still remains in existence today, it continued to provide meteorological instruments throughout much of the Twentieth Century but the focus of the business has since diversified into environmental sampling and monitoring products.
An extraordinarily good early example with a very distinctive case and a nice early example of Louis Casella’s output.
Circa 1860
Price The price has been listed in British Pounds.
Conversion rates as of 7/NOV/2024. Euro & Dollar prices will vary and should only be used as a guide.
Always confirm final price with dealer. Sold
Category Antique Barometers and Barographs
Period Mid Victorian Antiques
Material Ebonised
Origin English
Maker Louis Casella
Item code as542a698
Status Sold
£0 
$0.00 
€0.00 
$
€
Conversion rates as of 7/NOV/2024. Euro & Dollar prices will vary and should only be used as a guide.
Always confirm final price with dealer. Sold
View all stock from
Jason Clarke Antiques
Private dealerBy appointment only
Newbury
Berkshire
Tel : 07815 046645
Non UK callers : +44 7815 046645
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