Strange Tests Prove Invisible Colors in Eyes and Beings
The article explains color vision differences among humans, cats, and bees, noting how cones and rods shape color perception. It outlines a three stage theory of eye evolution from black and white to blue yellow and full color, and suggests future eyes may perceive far more colors.
MENTIONED IN THIS ARTICLE
P. A. Carmichael
Christine Ladd-Frankin
Columbia University
Mr. Carmichael
Mr. Carmichas
Ladd-Franken
Catalyst Power Turns Slow Dyeing Into Quick Work
A broken thermometer caused mercury to spill into a dye vat, unexpectedly speeding dyeing from hours to minutes. The mercury acted as a catalyst, accelerating reactions without being consumed, a property also seen in platinum. Catalysts boost reactions, used commercially in certain lighters where platinum aids ignition without changing itself.
The Ladybird Beetle and Its Pest Control Role
A report notes the ladybird beetle in a red and black cloak is valued for bringing luck and for curbing scale insects infesting American orange ranches. After Australia ships the beetle to California orchards, a USDA expert confirms the ladybird is the pest’s natural enemy, helping roses and hops growers.
MENTIONED IN THIS ARTICLE
Australia
United Stated Department of Agriculture
California
Noiseless steering gear promises safer motoring advance
A feature on a noiseless steering gear explains how a center wheel lever selects gears from reverse to high with no perceptible gear clash. The invention allows shifting at any speed, keeps hands on the wheel, boosts safety, and claims economical fuel use and quicker shifts for higher average speed. Also notes the seven spotted ladybird and its role against greenflies, plus a discussion on minute alcohol traces in the human body and their possible origins.
Bath Thermometer Patented for Safe Bath Temperatures
Jack D. Sartakoff of New York patents a wall hung bath thermometer with a dangling bulb and flexible tube. A hermetically sealed bulb responds to water temperature, expanding or contracting air to move a liquid in a glass tube and a Fahrenheit scale beside it, allowing a quick check of bath water temperature for children and adults.
MENTIONED IN THIS ARTICLE
Jack D. Sartakoff
New York
Purdah Customs Amid Calls for Reform at Women’s Conference
An account notes enduring purdah practices in India despite reform advocacy. The Begum of Bhopal and Maharani Chandra Vatibai are cited, with Begum speaking against veiling at a conference opened by Lady Irwin. The Ranee of Mandi participates in Delhi life, yet endures purdah at home.
MENTIONED IN THIS ARTICLE
Chandra Vatibai
Indore
Lady Irwin
India
Begum
Bhopal
Purdah
Pardah
Princess of
Ranee of
Paris
Delhi
Also Mentioned on This Page
Amma, Len
Uable Metant
Mercury
Mohammedan Aman
Romen Dhave
Eedom
Uying
Qutet
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