Table of contents
Recently Patented Inventions
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New Kind of Rays Emitted from the Brain and Nerve Centers - p151
doi:10.1038/scientificamerican02201904-151
Extensive Submarine Construction Programme for Great Britain - p151
doi:10.1038/scientificamerican02201904-151a
Magnetic Brake for Small Electric Motors - p152
doi:10.1038/scientificamerican02201904-152
Photography of Star Shadows - pp152 - 154
Emile Guarini
doi:10.1038/scientificamerican02201904-152a