BOHUSLAV BRAUNER
COMMEMORATIVE POSTAGE STAMP
|
|
|
|
|
PERSONALITIES BOHUSLAV BRAUNER |
COMMEMORATIVE POSTAGE STAMP |
||
| Date of issue: | 13. 4. 2005 | |
| Face value: | 7,50 CZK | |
| Printing sheets: | 50 stamps | |
| Size of the stamp: | 23 x 40 mm | |
| Graphic Artist: | Oldřich Kulhánek | |
| Engraver: | Milo Ondráček | |
| Method of printing: | rotary recess print in dark brown combined with photogravure in rosy, bluegreen and violet | |
| Subject of the stamp: | a major Czech inorganic chemist Bohuslav Brauner (1855-1935), professor at the Faculty of Science of Charles University, mainly studied rare earth metals, determination of their atomic weights and their classification in the periodic system of elements. He was a friend of D.I. Mendeleev. In the 80s of the 19th century he anticipated the existence of isotopes and used oxygen as the basis of relative atomic weights of elements, which later became an internationally accepted design. Professor Brauner was the author or a co-author of approximately 170 publications. The postage stamp featuring a portrait of this follower and promoter of the periodic law and periodic system of elements is issued on the occasion of the 150th anniversary of his birth. | |
| Catalogue No.: | 0431 | |
|
|
|
