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Negretti and Zambra

Negretti and Zambra is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Negretti and Zambra rather than just read about it. In short: Negretti and Zambra (active 1850 – c. 1985) was a company that produced scientific and optical instruments and also operated a photographic studio based in London. History Henry Negretti (1818–1879) and Joseph Zambra (1822–1897) formed a partnership in 1850, thereby founding the firm which would eventually be appointed opticians and scientific instrument makers to Her Majesty Queen Victoria, Prince Albert and King E…

Negretti and Zambra — main illustration
Negretti and Zambra — illustration

Key takeaways

  • Negretti and Zambra belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Negretti and Zambra to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Negretti and Zambra from memory before moving on to harder problems.

Reference excerpt

Negretti and Zambra (active 1850 – c. 1985) was a company that produced scientific and optical instruments and also operated a photographic studio based in London.

History Henry Negretti (1818–1879) and Joseph Zambra (1822–1897) formed a partnership in 1850, thereby founding the firm which would eventually be appointed opticians and scientific instrument makers to Her Majesty Queen Victoria, Prince Albert and King Edward VII, the Royal Observatory and the British Admiralty. Henry (Enrico Angelo Lodovico) Negretti was born in Como, Italy. Joseph Warren Zambra was born in Saffron Walden, Essex the son of Joseph Cezare Zambra and Phyllis Warren. When the Crystal Palace was re-erected in Sydenham in 1854, Negretti and Zambra became the official photographers of the Crystal Palace Company, which allowed them to photograph the interior and grounds of the new building. The firm made use of this access to produce a number of stereographs. In 1856 Negretti and Zambra sponsored a photographic expedition to Egypt, Nubia and Ethiopia conducted by Francis Frith. More than 500 stereographs of Frith's voyage were produced by the firm between 1857 and 1860. Negretti and Zambra personally photographed Shakespeare's House, Stratford-upon-Avon. A sepia photograph was then pasted onto card 4" × 2.5". This was then presented to visitors to the Crystal Palace to enable them to compare it with the model erected by Mr. E. T. Parris — better known for his monumental panoramic paintings — in the Centre Transept. The card is headed "Crystal Palace April 23rd 1864." Between 1855 and 1857 Negretti and Zambra commissioned the photographer Pierre Rossier to travel to China to document the Second Opium War. Although Rossier subsequently was unable to accompany Anglo-French forces in that campaign, he nevertheless produced a number of stereographs and other photographs of China, Japan, the Philippines and Siam (now Thailand), which Negretti and Zambra published and that represented the first commercial photographs of those countries. In May 1863 Henry Negretti took the first aerial photographs of London from a balloon piloted by Henry Coxwell. In 1865 they also published a book, titled A Treatise on Meteorological Instruments, which was reprinted in 1995. Francis Woodbury's stereoscopic slides on glass of Java were published in England by Negretti and Zambra.

Takeover In 1985 Negretti and Zambra was purchased by the avionics company Meggitt.

Gallery Additional photos of Negretti Zambra Military Telescope:

See also Pierre Rossier, a photographer commissioned by Negretti and Zambra Aylesbury F.C., originally the works team of Negretti and Zambra Zambretti Forecaster, a weather-forecasting device

References

External links Works by Joseph Zambra at Project Gutenberg Works by or about Negretti and Zambra at the Internet Archive Works by Negretti and Zambra at LibriVox (public domain audiobooks) Negretti & Zambra Centenary : 1850 - 1950 Readers should be aware of two major errors in the Centenary Brochure. 1) The captions to the photographs of James Glaisher and Vice Admiral Sir Robert Fitzroy are transposed. 2) The claim that Charles Darwin sailed aboard the Beagle with the firms instruments is incorrect since the Beagle sailed in 1831, 19 years before the founding of the company when Henry Negretti would have been 13 years old and Joseph Zambra 9 years old. Photo of Negretti & Zambra Thermometer registering -68F at Dawson City, Yukon, January 15th 1901 Negretti & Zambra A historical site about Negretti & Zambra sponsored by Barometer World of Merton A "Potted History" of Negretti & Zambra 1850 - 1999 in 2 volumes by David Day, former publicity manager of Negretti & Zambra, is available. Negretti & Zambra barometers — illustrated examples

Illustrations

Negretti and Zambra: Negretti Zambra Telescope issued by the British military, date unknown
Negretti Zambra Telescope issued by the British military, date unknown
Negretti and Zambra: Detail from Negretti Zambra Telescope issued by the British military, date unknown
Detail from Negretti Zambra Telescope issued by the British military, date unknown
Negretti and Zambra illustration
Negretti and Zambra illustration
Negretti and Zambra illustration

Worked examples

Example 1 — a first encounter with Negretti and Zambra

Start with the simplest possible case. Write down what Negretti and Zambra claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Negretti and Zambra before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Negretti and Zambra ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Negretti and Zambra

In research
Negretti and Zambra appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Negretti and Zambra in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Negretti and Zambra is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1850 establishments in England, 19th-century English photographers, Architectural photographers, so understanding it makes those chapters shorter.
In everyday life
Look for Negretti and Zambra outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Negretti and Zambra in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Negretti and Zambra means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Negretti and Zambra out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Negretti and Zambra in simple terms?

Negretti and Zambra (active 1850 – c. 1985) was a company that produced scientific and optical instruments and also operated a photographic studio based in London. History Henry Negretti (1818–1879) and Joseph Zambra (1822–1897) formed a partnership in 1850, thereby founding the firm which would ev…

Why does Negretti and Zambra matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Negretti and Zambra?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Negretti and Zambra.

Tags

  • 1850 establishments in England
  • 19th-century English photographers
  • Architectural photographers
  • Avionics companies
  • Borough of Fareham
  • Photographers from London
  • Photographic studios
  • Photography companies of the United Kingdom
  • Photography in China
  • Photography in Japan
  • Photography in Thailand
  • Portrait photographers

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