Share this page!

Enter URL or ID to Unroll

You can paste full URL like: https://x.com/threadreaderapp/status/1644127596119195649
or just the ID like: 1644127596119195649

How to get URL link on X (Twitter) App

  1. On the Twitter thread, click on or icon on the bottom
  2. Click again on or Share Via icon
  3. Click on Copy Link to Tweet
  4. Paste it above and click "Unroll Thread"!
  5. More info at Twitter Help
সত্যান্বেষী Profile picture
@satyanewshi
Mar 7, 2022 • 11 tweets • 7 min read • Read on X
Scrolly
#MountEverest has been scaled by many mountaineers but no body knew accurately the height of the highest peak, in the past - but it was calculated accurately by one #Bengali genius #Mathematician . Read the thread to know the fascinating details
In 1831, surveyor-general of India George #Everest was looking for a mathematician who had specialised in spherical #trigonometry to join the #GreatTrigonometricSurvey
#RadhanathSikdar, a student and a master in spherical trigonometry from Kolkata’s Hindu College (now #PresidencyUniversity) was handpicked for the #survey department of the #British government in the 1830s
Sikdar, at 19, was appointed in that post, as a “computor”. His salary was Rs 30 per month.
livehistoryindia.com/story/people/t…
As part of the team set up for the Great Trigonometric Survey started by George Everest, then surveyor general of India, Sikdar travelled across India to conduct #geodetic surveys.
madrascourier.com/biography/radh…
In 1852, Everest’s successor Andrew Scott Waugh asked Sikdar & his team to start measuring the the height of mountains
Sikdar used data from six observations and calculated the height of Peak XV and stated that it was taller than Kanchenjungha, which was till then considered the highest mountain peak in the world.
Peak XV came to be named after the previous surveyor-general, Everest with a calculated elevation of exactly 29,000 feet or 8,839.2 metres (today corrected to 8,848 metres).
Sikdar, a follower of #Derozio, was a brilliant student of Hindu College. He was equally famous for social service & played a leading role in passing of the Widow Remarriage Act, prohibition of child marriage & polygamy.
In 2004 GOI released a stamp honouring his contribution on the occasion of the 200th anniversary of the establishment of the Great Trigonometric Survey in Chennai, India.
#Scroll has made a fabulous video explaining the History in brief as well as the Methodology used by Sikdar who computed near accurately the height of Mount Everest which is sheer inspiring & a brilliant tribute to the genius Mathematician .

• • •

Missing some Tweet in this thread? You can try to force a refresh
　

Keep Current with সত্যান্বেষী

সত্যান্বেষী Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @satyanewshi

সত্যান্বেষী Profile picture
Apr 6
Paramount - The Revolutionary Sherbet shop of Kolkata
As heat wave hits summer,a cool sherbet that quenches thirst as well as caters to taste buds is indeed a bliss
Know about this heritage institution in this 🧵 Image
Located in the most vibrant area of Kolkata in the vicinity of reputed heritage educational institutions, in College Street near Mahabodhi Society
Paramount Juice centre has made a name & fame for itself among Kolkata people for more than a century Image
The enterprise was started by Nihar Ranjan Majumder who was originally from Barisal ( now in present-day Bangladesh) in 1918 relocated to Kolkata Image
Read 21 tweets
সত্যান্বেষী Profile picture
Mar 23
The World’s largest Democracy’s 1st election was a mammoth task with humongous challenges ,an unsung hero made it possible & estd the frame work of conducting elections in India~He is Sukumar Sen,1st Election commissioner of Independent India.
A🧵on forgotten history Image
As the Constitution of India came into effect on January 26, 1950, Prime Minister Jawaharlal Nehru was anxious to get the elections underway as soon as possible.
Image
Image
Govt of India passed Representation of the People Act in 1950 & 1951 successively which provided the framework for the elections Image
Read 46 tweets
সত্যান্বেষী Profile picture
Dec 16, 2023
With the sun setting on Raisina Hill on December 16, 1971, Prime Minister Indira Gandhi reached Parliament @ 5:30 pm & informed the world “Dacca is now the free capital of a free country."

Here is a Master 🧵 on 1971 Bangladesh Liberation war
Image
Image
1.The Genocide

2.The Defiance

Read 6 tweets
সত্যান্বেষী Profile picture
Nov 30, 2023
Legacy of JC Bose

Sir Jagadish Chandra Bose a Bengali scientist -a biologist, a physicist, a botanist and also a writer of science fiction & was also 1st in the world to initiate interdisciplinary research Image
Bose demonstrated how plants responded to various stimuli, demonstrating the electrical nature of this conduction. He is considered a pioneer in the field of biophysics.
Image
Image
Bose contrived a very sophisticated instrument called the crescograph, which could record and observe plants minute responses to external stimulants
Image
Image
Read 10 tweets
সত্যান্বেষী Profile picture
Nov 26, 2023
Ray Tales - The Chess Player

Academy Museum described Statyajit Ray’s Movie “ Shatranj ke Khiladi” as an “elegant dissection of colonialism”

A 🧵 on the Movie Image
Shatranj Ke Khilari was the first and only full-length Hindi / Urdu feature film made by Ray. It had an ensemble star including Sanjeev Kumar, Amjad Khan, Richard Attenborough, Shabana Azmi, and Tom Alter. The movie was released on 3rd October, 1977


Image
Image
Image
Image
Its a story of two aristocratic friends immersed in playing chess while a bloodless coup on Awadh by a handful of British soldiers was underway .
Image
Image
Read 26 tweets
সত্যান্বেষী Profile picture
Oct 17, 2023
Kolkata’s Durga puja pandals have theme that educate masses on various social/historical/cultural aspects through Art.
One such unique theme is of Dum Dum Park’s Tarun Dol’s puja-depicting history of the Legend of Netaji Subhas Bose & the Women Freedom fighters of Bengal 🔥 Image
Durga puja & Netaji has an interesting history entangled - When Subhas Bose was imprisoned in Presidency Jail ( Alipore ,Calcutta),Bose demanded that Bengali prisoners be allowed to perform the Durga Puja in Jail premises & wrote to the Superintendent of the Presidency Jail
Image
Image
It is said that after Puja during the immersion time when his nephew & other family members came to receive the idol he slipped in a letter to his nephew Sisir Bose to sent a letter to Mian Akbar Shah -a NWFP Forward Bloc member & the plan for Great escape was put into action Image
Read 17 tweets

Did Thread Reader help you today?

Support us! We are indie developers!

This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Don't want to be a Premium member but still want to support us?

Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!

Ethereum

0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy

Bitcoin

3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us!

Send Email!

:(