| Added by |
 Maciej Pasztor
|
| General Description : | Michał Sędziwój (Michael Sendivogius, Sędzimir) (1566–1636) of Ostoja coat of arms was a Polish alchemist, philosopher, and medical doctor. A pioneer of chemistry, he developed ways of purification and creation of various acids, metals and other chemical compounds. He discovered that air is not a single substance and contains a life-giving substance-later called oxygen-170 years before Scheele and Priestley. He correctly identified this 'food of life' with the gas (also oxygen) given off by heating nitre (saltpetre). This substance, the 'central nitre', had a central position in Sędziwój's schema of the universe. |
| Face value | 1,55 Zloty |
| Catalog code (Michel) | PL 4529 |
| Catalog code (Scott) | PL 4015 |
| Catalog code | Yvert et Tellier PL 4249 Stanley Gibbons PL 4462 AFA number PL 4431 Polish Stamps Catalog (Fischer) PL 4379 |
| Series | Poles on world |
| Stamp colour | multicolor |
| Stamp use | Commemorative stamp |
| Print run | 400,000 |
| Issue date | 29/08/2011 |
| Designer | janusz Wysocki |
| Paper type | white medium smooth fluorescent |
| Print technique | Offset lithography |
| Printed by | PWPW SA (Polska Wytwórnia Papierow Wartosciowych SA) |
| Perforation | Syncopated 11½ |
| Height | 31.25 mm |
| Width | 43.00 mm |
| Catalog prices | No catalog prices set yet |
