Boulenges chronograph for the determination of the velocity of projectiles
1867
Safety lamp
c.1881
Safety lamp
-1884
Safety lamp
Safety lamp
1883
Safety lamp
-1881
Safety lamp
Safety lamp
-1881
Baltospot 140 x-ray machine by Balteau
1959-1969
Safety lamp
1883
Safety lamp
-1881
Safety lamp
-1884
Safety lamp
-1880