Sisters Computer
Four Sisters of the Holy Child Mary – Sisters Emilia Ponzoni, Regina Colombo, Concetta Finardi and...
Repsold Micrometers
Once the photographic plates for the Carte du Ciel program were taken, the positions of the...
Chart from Carte du Ciel
The Carte du Ciel was a photographic atlas of the sky, with each photographic plate covering an...