MALI (1983) Lavoisier*. Laboratory apparatus*. Formula for water*. Deluxe sheet commemorating Bicentenary of Lavoisier's Water Analysis. Scott No 476, Yvert No 475. Hard to find!
AVAILABLE AT $30
FRANCE (1958) Berthollet*. Deluxe sheet. Berthollet was a chemist who proposed that the rate of chemical reactions was dependent on their concentration. Scott No 872, Yvert No 1149. Not easy to find!]
AVAILABLE AT $20
UPPER VOLTA (1970) Lab equipment*. Deluxe sheet, Chemical Industry - Hanover Fair. Scott No 223, Yvert No 221. Attractive!
AVAILABLE AT $20
SENEGAL (1974) Lab equipment*. Deluxe sheet, Dakar International Fair. Scott No 405, Yvert No 406. Hard to find!
AVAILABLE AT $15
FRANCE (1986) Moissan*. Chemical formula*. Laboratory glassware*. Deluxe sheet. Moissan discovered many of the properties of fluorine compounds. He was also the first to produce artificial diamonds. Scott No B576, Yvert No 2397.Interesting!
AVAILABLE AT $15
FRANCE (1986) Heroult*. Aluminum*. Deluxe sheet. Heroult, along with Hall, discovered the process for refining aluminum. Scott No B579, Yvert No 2400.
AVAILABLE AT $15
NEW CALEDONIA (1993) Distillation of attar from Niaouli flowers*. Deluxe sheet. Scott No C243, Yvert No PA297.
AVAILABLE AT $15
FRANCE (1957) Thenard*. Crystals*. Deluxe sheet. Scott No 864, Yvert No 1139.
AVAILABLE AT $35
FRANCE (1956) Sabatier*. Chemical apparatus*. Deluxe sheet. Sabatier contributed much to the science of catalytic chemistry. Scott No 793, Yvert No 1058.
AVAILABLE AT $30