
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

Etching Glass with Hydrofluoric Acid

A Simple Wire-winding Apparatus

Projectile Photography

Photo-micrography for Amateurs

A Photographic Telescope