
The SciencesOctober 17, 1914
Projectile Photography
Easily Arranged Apparatus for Studying the Flight of Bullets

Projectile Photography
Easily Arranged Apparatus for Studying the Flight of Bullets

Hints for Young Microscopists

A Simple Wire-winding Apparatus

Etching Glass with Hydrofluoric Acid

Projectile Photography

Photo-micrography for Amateurs

A Photographic Telescope