Cephalopods of Naples

From an 1896 monograph by Giuseppe Jatta.  The illustrator is Comingio Merculiano (1845- 1915), a professional watercolor painter hired in 1885 by prof. Anton Dohrn as in-house illustrator for the Naples Zoological Station, and one of the best scientific illustrators to date. This book on cephalopods is his masterpiece.

via BibliOdyssey: Neapolitan Cephalopods

Images hosted by the Biodiversity Heritage Library on behalf of the Smithsonian Institution

(via premierepage)


(Source: b0d, via premierepage)


Tarmasz (Faustine) is an illustrator in Paris. She also works as a tattoo artist, using her one-off designs. Her tattoos are on tumblr.

(via shelookedback)





Katana anatomy

higher temperature forging will make steel harder, sharper, but more brittle, so if you have the whole blade like that it could break easier

slower forging makes the steel more flexible but softer

so what they can do is make the blade portion the harder sharper kind of steel and the core more flexible and softer

I’m typing this from memory from some thread on swords I read a long time ago, but it’s pretty cool

Materials Engineering is sorta my wheelhouse and I can confirm what you said. If you look at the different blade compositions, you’ll notice that in every case, the actual edge is made from hard steel. As you said, the reason for this is because it is harder and can be made sharper. However, making the entire blade out of it isn’t the best idea because it will not be flexible at all and very prone to chipping or breaking. The medium steel adds strength to the backbone of the blade. The iron is heavier than the steel, adding a bit of weight to the blade. It is also easier to make than steel, so it can be used for a large volume of the blade. The folded steel is the toughest part of the blade, being made from a very elaborate process which removes impurities from the steel and makes it incredibly tough. The Soshu Kitae blade type, also known as the “seven layers method” is the design used by the famous swordsmith Masamune. More information can be found here.




All Artwork Copyright Olivier SILVEN.