Albert Einstein visual arts exhibition

This is a video about a 2008 exhibition in the Lakenhal and Boerhaave museums in Leiden, the Netherlands about the Kamerlingh Onnes family. Some people in that family were physicists (with a special interest in cold temperatures), some were visual artists.

Albert Einstein, 1920 drawing by Harm Kamerlingh Onnes

Translated from NOS TV in the Netherlands:

Albert Einstein in Leiden museum

Today, 19:23

Leiden artist Harm Kamerlingh Onnes (1893-1985) has portrayed twenty renowned scholars in the years when they visited his uncle, the Nobel Prize winner Heike Kamerlingh Onnes. Among them was Albert Einstein. Boerhaave Museum in Leiden has now acquired these sketches and drawings. The majority was not known until now.

Harm was in 1920 and 1921 also regularly found in the laboratory of his uncle Heike, who was doing research on absolute zero temperature (-273 ° C). He made portraits and recorded how his uncle and staff were busy with their experiments.


The physicist Heike Kamerlingh Onnes received the Nobel Prize in 1913. In his Leiden home, Huize ter Wetering at the Galgewater, at that time many foreign guests visited.

The house was a meeting place for scholars and artists, including Marie Curie, Albert Einstein and Niels Bohr. They met there Dutch artists like Jan Toorop, Albert Verwey and Carel Lion Cachet.


The collection of drawings is from the estate of a son of Harm Kamerlingh Onnes. A selection will be on show from 21 February until 26 April at the Museum Boerhaave in Leiden. About the family of scientists and artists an accompanying booklet has been published with the title Koude, kunst, Kamerlingh Onnes [Cold, art, Kamerlingh Onnes], written by Dirk van Delft.

See also here. And here.

Archaeological research in Leiden inner city

This video is called History of the Faculty of Archaeology in Leiden.

Leiden in the Netherlands is quite old. Early in the Middle Ages, there was a burgrave’s castle and a village along the Rhine river. In 1266, it became a city.

During the first months of 2015, there will be digging in the inner city of Leiden, to put underground waste containers in the holes. These underground waste containers replace waste bags which are vulnerable to damage by herring gulls and lesser black-backed gulls nesting in the city.

The digging for the containers is an opportunity for archaelogists. In 26 of the inner city holes, archaeologists will look for new discoveries in Leiden medieval history.

A map of places where there will be archaeological research is here.

Leiden botanical garden celebrates its 425 years

This June 2012 video is about the Hortus Botanicus in Leiden, the Netherlands.

And this video is the sequel.

From the botanical garden in Leiden, the Netherlands, on 3 February 2015:

Jubilee: 425 years of the Hortus botanicus Leiden

In 2015 we will be celebrating the foundation, in 1590, of the Hortus botanicus Leiden. We are proud that the garden is still on its original site, and that we are still an academic garden, a place where visitors can enjoy and learn about the plants but where scientific research is also important. We have planted 30,000 extra bulbs to celebrate this Jubilee.

Read more here about the Hortus now and in the past.

Take a walk with Clusius

Carolus Clusius (1526-1609), the very first prefect (director) of the Hortus, already had tulips and tomatoes growing in the garden; Leiden was the starting point for the tulip’s ‘conquest of the world’. Please ask at the admissions desk if you would like a guidebook for a walk past our magnificent display of spring flowers. Available from February to May.

Botanical art

Anita Walsmit Sachs regularly provides botanical drawing courses in the Hortus, and by popular demand she will be giving lessons in English in April 2015. Be sure to register on time, as there is always a lot of interest in the botanical drawing courses.

English walking tour

On eight different dates this summer you will be able to take a walking tour of the garden with an English-speaking guide. These provide a wonderful opportunity to learn more about the history of the Hortus and about the ‘jewels in our crown’. These tours start at 11:00 on: 02.07, 09.07, 16.07, 23.07, 30.07, 06.08, 13.08, 20.08, 27.08. Fee €1.50 plus entrance to the garden. No need to book, just come along.

Sixteenth century botanist Clusius now on the Internet

This video says about itself:

Tulipomania, The Golden Age

19 October 2007

The vast riches that poured into Holland in the 17th century helped establish centers of learning, like the university of Leiden setting the stage for the formal study of horticulture. The simultaneous arrival of the tulip also set the stage for deep passion and deep envy.

This video includes information on sixteenth/seventeenth century botanist Carolus Clusius.

It says the defeat of the Spanish Armada during the Dutch revolt aganst the king of Spain was in 1572; actually, this was 1588.

From the Digital Web Center for the History of Science in the Low Countries:

Digital edition of the Clusius correspondence

Tulpengekte - Johannes de Jonghe aan Clusius, 1596-05-14, Vul. 101 UBL

Johannes de Jonghe to Clusius, 1596. UBL Vul. 101.

The Clusius letters

The correspondence of Carolus Clusius comprises more than 1550 letters, of which some 1300 are kept in the University Library Leiden (facsimiles can be consulted on the website of the University Library Leiden). The letters are written by Clusius and a range of persons from all social layers with an interest in natural history, gardening, literature, travel, politics, religion and everyday life. Over the course of the last two centuries, these letters have attracted the attention of several historians and biologists, but a complete edition of the correspondence was never realized.

Online edition in e-Laborate

Huygens ING and the Scaliger Institute made a big step towards a complete digital edition of the Clusius correspondence, by assembling and digitizing all existing transcriptions of the letters in eLaborate (an online transcription tool developed by Huygens ING). The beta release of this edition, which contains the possibility to perform full text searches, has now been placed online for registered users. Included are the metadata of all known letters, mostly accompanied by facsimile reproductions from the University Library Leiden, and 450 transcriptions of letters made by different researchers in the course of the twentieth and twenty-first centuries. Texts of the approximately 630 published letters are to be added in the course of the coming years.

The expected web edition is not a scientific edition in the classical sense. Due to the many different sources of the (published and unpublished) transcriptions, the quality of the edition is not uniform. Furthermore, virtually no annotation will be added. But by publishing this edition as work-in-progress, we expect to offer an invaluable source that can be searched, improved and elaborated by everyone.

Search and collaborate!

Researchers and students are invited to browse and search the beta release of the online edition and to join the project with new transcriptions, translations, improvements of existing transcriptions, annotations etc. Those interested may send an email to the project manager,

Here you can read the instructions for the use of the Clusius correspondence in eLaborate: Instructions Clusiuscorrespondence eLaborate

First Tyrannosaurus rex going to European museum

This video says about itself:

Why we bring the first T-Rex to Europe: Anne Schulp at TEDxLeiden

25 January 2014

We are increasingly confronted with the consequences of global warming and the loss of bio-diversity. The more we understand and appreciate the wonder of nature, the better we are able to sustain our life on this planet. This is where the T-Rex comes in. Can you imagine another creature that has been able to better capture the imagination of kids? This is why we decided to go on an epic journey to find a real T-Rex and bring it to Europe. We believe that through telling the story of this T-Rex and its excavation we can get more kids to experience the wonder of life on this planet.

Paleontologist Anne Schulp is a researcher at Naturalis Biodiversity Center in Leiden. The natural history collection of Naturalis is extensive, but one kind of dinosaur was conspicuously absent: a large carnivore. This changed recently, when Anne helped excavating a Tyrannosaurus fossil in Montana, USA.

Translated from NOS TV in the Netherlands today:

About one and a half years from now, for the first time ever a skeleton of a Tyrannosaurus rex will move to outside the United States, namely to the Netherlands. Naturalis Biodiversity Center in Leiden has received 5 million to buy a skeleton of the dinosaur. It was excavated in 2013 in the US state Montana.

Last year, scientists at the research institute and natural history museum excavated large parts of the Tyrannosaurus rex in Montana. It is a well-preserved skeleton of a then probably 30 years old female. …

Naturalis has received a part of the money through crowdfunding.

See also here. And here.

Stick insects in botanical garden

This video says about itself:

Extatosoma tiaratum moulting

A female giant prickly stick insect moulting. The average speed is 5x with some time lapses. The entire ordeal took about an hour.

Accompanying music is by the Kilimanjaro Darkjazz Ensemble (song: Pearls for Swine).

There are now not only exotic butterflies, but also stick insects in the hothouses in the botanical garden in Leiden in the Netherlands.

They are giant prickly stick insects from Australia.