Milestones of Science...

The 175th anniversary of birth D.I. Mendeleev

Hi !I have selected two great personalities of Science for today's Post. The first one is a beautiful Souvenir sheet issued by Russia commemorating The 175th anniversary of birth of Dmitry Ivanovich Mendeleyev whose name is a milestone in the field of Chemistry. Those who have ever read Chemistry can never forget Mendelyev's Periodic Table of Elements. The other stamp and souvenir sheet is on Charles Darwin recently issued by Portugal, whose 200th Birth anniversary is being celebrated this month. As I wrote in my Darwin's previous post, Charles Darwin was one of the greatest naturalists of all time. A name which is one of the milestones in the field of science. This post is dedicated to the great personalities whose work will remain in golden letters in the field of science. Well when I was surfing on net I was just thrilled to see nice issues on these great personalities and its takig me back to the days of my school and college when these names were very familiar to us and we used to learn Mendleyev Periodic Table in Chemistry and Darwin's Theory of Evolution in Biology .The Periodic Table is depicted in the background of the souvenir sheet. The stamps are Souvenir sheets are just wonderful, sure to be liked by collectors of Science theme as well as those associated with the field of science. This is all for this morning !.....Till next Post....Have A Nice time..!

Date of Issue - 6 February 2009

The 175th anniversary of birth D.I. Mendeleev (1834-1907)
Dmitry Ivanovich Mendeleyev (1834-1907) is the Russian scientist and public figure, encyclopedist. It is known as the chemist, physicist, economist, technologist, geologist, meteorologist, teacher, aeronaut. In 1869, working over «Chemistry Bases», he has opened one of fundamental laws of nature ? the periodic law of chemical elements. Dmitry Ivanovich also made a big contribution to metrology development. Since 1892 he headed the first scientific metrological establishment of Russia - the Main Board of Weights and Measures (nowadays – VNIIM n.a. D.I.Mendeleyev). Souvenir sheet represents: reference scales of firm “Nemets” of 1895, on which D.I.Mendeleev conducted exact weighings at renewal of standard of mass - pound (1895 - 1898) and nodule rock crystal from collection of minerals of Dmitry Ivanovich.

New Issues on Charles Darwin by Portugal

200th Birth anniversay of Charles Darwin

Date of Issue - 12 February 2009